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SubjectRe: [PATCH] VM fixes + RSS limits 2.4.0-test13-pre5


Ingo wrote:
> On Wed, Jan 03, 2001 at 09:43:54AM -0200, Rik van Riel wrote:
> > On Fri, 28 Dec 2000, Mike Sklar wrote:
> > > If I wanted to adjust the rlim_cur value of a running
> > > processes, is there any sort of interface for that?
> >
> > Hmmm, I don't think there is an interface to adjust the
> > per-process ulimit settings on-the-fly ...
> >
> > Does anybody know if there's an interface for this ?

> If you don't mean "kill -TERM", no there isn't. It would be evil
> to the process anyway.

The RSS limits patch I sent to linux-kernel some time ago provided an
experimental /proc interface to allow exactly this.
The patch against 2.2.16 is still on our FTP server at

ftp://ftp-au.aurema.com/private/aurpjc31/linux-2216-rsslimit.diff.bz2

Here's the patch against 2.4.0. The main differences between this and
Rik's patch are:
-- you choose soft or hard limits at kernel config time with my
patch; with Rik's you get both (rlim_cur is `soft' rlim_max is
`hard')
-- Rik's patch does some extra stuff to the VM code as well as
the RSS limits
-- Rik's patch doesn't affect swap behaviour (except in so far
as processes over their RSS limit will tend to swap, which reduces
memory pressure on all other processes); my patch means that
processes over RSS limit suffer somewhat
-- My patch puts the limit into the struct mm for slightly more
cache-friendly behaviour, and to allow later interfacing with
per-user resource-management software (it should be possible
to write a kernel module to adjust RSS limits to implement per-user
limits without affecting per-process RLIMIT values)
-- My patch has a /proc interface to allow setting
rlimit[RLIMIT_RSS]
-- my patch implements the rss accounting fields so that time -v
gives reasonable output


Index: linux-2.4.0/CREDITS
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/CREDITS,v
retrieving revision 1.1.1.5
diff -u -b -u -r1.1.1.5 CREDITS
--- linux-2.4.0/CREDITS 2001/01/04 23:02:54 1.1.1.5
+++ linux-2.4.0/CREDITS 2001/01/08 04:41:41
@@ -491,6 +491,24 @@
S: Stanford, California 94305
S: USA

+N: Kingsley Cheung
+E: kingsley@aurema.com
+D: Page fault calculation
+D: /proc/<pid>/rss support
+D: kswapd improvements regarding process RSS limits
+S: Aurema Pty Limited
+S: PO Box 305, Strawberry Hills NSW 2012,
+S: Australia
+
+N: Peter Chubb
+E: peterc@aurema.com
+D: Page fault calculation
+D: /proc/<pid>/rss support
+D: kswapd improvements regarding process RSS limits
+S: Aurema Pty Limited
+S: PO Box 305, Strawberry Hills NSW 2012,
+S: Australia
+
N: Juan Jose Ciarlante
W: http://juanjox.kernelnotes.org/
E: jjciarla@raiz.uncu.edu.ar
Index: linux-2.4.0/Documentation/Configure.help
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/Documentation/Configure.help,v
retrieving revision 1.1.1.6
diff -u -b -u -r1.1.1.6 Configure.help
--- linux-2.4.0/Documentation/Configure.help 2001/01/07 21:44:33 1.1.1.6
+++ linux-2.4.0/Documentation/Configure.help 2001/01/08 04:41:41
@@ -16955,6 +16955,50 @@
another UltraSPARC-IIi-cEngine boardset with a 7-segment display,
you should say N to this option.

+RSS Softlimits (EXPERIMENTAL)
+CONFIG_RSS_SOFTLIMIT
+ If you want the setrlimit(RLIMIT_RSS, ...) system call to work, say
+ Y either here or for RSS Hardlimits. If you don't understand this
+ you don't need it, so say N.
+
+ RSS Softlimits will make it more likely that pages will be stolen
+ from processes that have a resident set size (i.e., real memory
+ footprint) greater than their limit. Processes with a limit set
+ that is below their actual need may still exceed their limits, and
+ in this instance kswapd may work excessively hard.
+
+ Because of the way that RSS is measured and controlled, the limit is
+ approximate only.
+
+ It is harmless to have RSS Softlimits and RSS Hardlimits both set.
+
+RSS Hardlimits (EXPERIMENTAL)
+CONFIG_RSS_HARDLIMIT
+ If you want the setrlimit(RLIMIT_RSS, ...) system call to work, say
+ Y either here or for RSS Softlimits. If you don't understand this
+ you don't need it, so say N.
+
+ RSS Hardlimits changes the behaviour of the kernel at page-fault
+ time. If a process is over its RSS limit when it wants to get a new
+ page, then with this configuration option enabled the process's
+ memory space will be reduced before the page-fault continues.
+
+ Because of the way that RSS is measured and controlled, the actual
+ memory footprint of a process may exceed the set limit for a short
+ time.
+
+ It is harmless to have RSS Softlimits and RSS Hardlimits both set.
+
+Support for /proc/pid/rss (EXPERIMENTAL)
+CONFIG_PROC_RSS
+ Saying Y here adds an extra file inside each process directory in the
+ /proc file system that allows measurement and control of resident
+ set size (real memory footprint). The file format is documented in
+ Documentation/proc_rss.txt
+
+ The main purpose of this file is for testing the results of the RSS
+ Hardlimits or Softlimits configuration options.
+
IA-64 system type
CONFIG_IA64_GENERIC
This selects the system type of your hardware. A "generic" kernel
Index: linux-2.4.0/arch/alpha/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/alpha/config.in,v
retrieving revision 1.1.1.5
diff -u -b -u -r1.1.1.5 config.in
--- linux-2.4.0/arch/alpha/config.in 2001/01/04 23:31:47 1.1.1.5
+++ linux-2.4.0/arch/alpha/config.in 2001/01/08 04:41:42
@@ -231,6 +231,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
if [ "$CONFIG_PROC_FS" = "y" ]; then
choice 'Kernel core (/proc/kcore) format' \
"ELF CONFIG_KCORE_ELF \
Index: linux-2.4.0/arch/alpha/kernel/osf_sys.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/alpha/kernel/osf_sys.c,v
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.1 osf_sys.c
--- linux-2.4.0/arch/alpha/kernel/osf_sys.c 2000/10/04 00:17:47 1.1.1.1
+++ linux-2.4.0/arch/alpha/kernel/osf_sys.c 2001/01/08 04:41:42
@@ -1164,6 +1164,10 @@
r.ru_minflt = current->min_flt;
r.ru_majflt = current->maj_flt;
r.ru_nswap = current->nswap;
+ r.ru_maxrss = current->maxrss;
+ r.ru_ixrss = 0;
+ r.ru_idrss = current->irss;
+ r.ru_isrss = 0;
break;
case RUSAGE_CHILDREN:
r.ru_utime.tv_sec = CT_TO_SECS(current->times.tms_cutime);
@@ -1173,6 +1177,10 @@
r.ru_minflt = current->cmin_flt;
r.ru_majflt = current->cmaj_flt;
r.ru_nswap = current->cnswap;
+ r.ru_maxrss = current->cmaxrss;
+ r.ru_ixrss = 0;
+ r.ru_idrss = current->cirss;
+ r.ru_isrss = 0;
break;
default:
r.ru_utime.tv_sec = CT_TO_SECS(current->times.tms_utime +
@@ -1186,6 +1194,10 @@
r.ru_minflt = current->min_flt + current->cmin_flt;
r.ru_majflt = current->maj_flt + current->cmaj_flt;
r.ru_nswap = current->nswap + current->cnswap;
+ r.ru_maxrss = current->maxrss > current->cmaxrss ? current->maxrss : current->cmaxrss;
+ r.ru_ixrss = 0;
+ r.ru_idrss = current->irss + current>cirss;
+ r.ru_isrss = 0;
break;
}

Index: linux-2.4.0/arch/arm/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/arm/config.in,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 config.in
--- linux-2.4.0/arch/arm/config.in 2000/12/13 00:39:26 1.1.1.3
+++ linux-2.4.0/arch/arm/config.in 2001/01/08 04:41:42
@@ -251,6 +251,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
tristate 'NWFPE math emulation' CONFIG_NWFPE
choice 'Kernel core (/proc/kcore) format' \
"ELF CONFIG_KCORE_ELF \
Index: linux-2.4.0/arch/arm/mm/fault-common.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/arm/mm/fault-common.c,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 fault-common.c
--- linux-2.4.0/arch/arm/mm/fault-common.c 2000/12/13 05:19:47 1.1.1.2
+++ linux-2.4.0/arch/arm/mm/fault-common.c 2001/01/08 04:41:42
@@ -100,9 +100,15 @@
switch (fault) {
case 2:
tsk->maj_flt++;
+#if CONFIG_PROC_RSS
+ update_flt_rate(&(tsk->maj_flt_rate), &(tsk->maj_flt_time));
+#endif
return fault;
case 1:
tsk->min_flt++;
+#if CONFIG_PROC_RSS
+ update_flt_rate(&(tsk->min_flt_rate), &(tsk->min_flt_time));
+#endif
case 0:
return fault;
}
Index: linux-2.4.0/arch/i386/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/i386/config.in,v
retrieving revision 1.1.1.5
diff -u -b -u -r1.1.1.5 config.in
--- linux-2.4.0/arch/i386/config.in 2001/01/04 23:31:17 1.1.1.5
+++ linux-2.4.0/arch/i386/config.in 2001/01/08 04:41:42
@@ -226,6 +226,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
if [ "$CONFIG_PROC_FS" = "y" ]; then
choice 'Kernel core (/proc/kcore) format' \
"ELF CONFIG_KCORE_ELF \
Index: linux-2.4.0/arch/i386/mm/fault.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/i386/mm/fault.c,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 fault.c
--- linux-2.4.0/arch/i386/mm/fault.c 2000/12/13 00:20:39 1.1.1.3
+++ linux-2.4.0/arch/i386/mm/fault.c 2001/01/08 04:41:42
@@ -4,6 +4,7 @@
* Copyright (C) 1995 Linus Torvalds
*/

+#include <linux/config.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
@@ -18,6 +19,10 @@
#include <linux/interrupt.h>
#include <linux/init.h>

+#ifdef CONFIG_PROC_RSS
+#include <linux/rss.h>
+#endif
+
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
@@ -196,9 +201,15 @@
switch (handle_mm_fault(mm, vma, address, write)) {
case 1:
tsk->min_flt++;
+#if CONFIG_PROC_RSS
+ update_flt_rate(&(tsk->maj_flt_rate), &(tsk->maj_flt_time));
+#endif
break;
case 2:
tsk->maj_flt++;
+#if CONFIG_PROC_RSS
+ update_flt_rate(&(tsk->min_flt_rate), &(tsk->min_flt_time));
+#endif
break;
case 0:
goto do_sigbus;
Index: linux-2.4.0/arch/ia64/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/ia64/config.in,v
retrieving revision 1.1.1.4
diff -u -b -u -r1.1.1.4 config.in
--- linux-2.4.0/arch/ia64/config.in 2001/01/07 21:44:41 1.1.1.4
+++ linux-2.4.0/arch/ia64/config.in 2001/01/08 04:41:42
@@ -93,6 +93,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
tristate 'Kernel support for ELF binaries' CONFIG_BINFMT_ELF
tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC

Index: linux-2.4.0/arch/ia64/ia32/binfmt_elf32.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/ia64/ia32/binfmt_elf32.c,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 binfmt_elf32.c
--- linux-2.4.0/arch/ia64/ia32/binfmt_elf32.c 2001/01/07 21:44:41 1.1.1.3
+++ linux-2.4.0/arch/ia64/ia32/binfmt_elf32.c 2001/01/08 04:41:42
@@ -204,7 +204,8 @@

for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
if (bprm->page[i]) {
- current->mm->rss++;
+ if (++(current->mm->rss) > current->mm->maxrss)
+ current->mm->maxrss = current->mm->rss;
put_dirty_page(current,bprm->page[i],stack_base);
}
stack_base += PAGE_SIZE;
Index: linux-2.4.0/arch/m68k/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/m68k/config.in,v
retrieving revision 1.1.1.4
diff -u -b -u -r1.1.1.4 config.in
--- linux-2.4.0/arch/m68k/config.in 2001/01/07 21:44:42 1.1.1.4
+++ linux-2.4.0/arch/m68k/config.in 2001/01/08 04:41:42
@@ -91,6 +91,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
if [ "$CONFIG_PROC_FS" = "y" ]; then
choice 'Kernel core (/proc/kcore) format' \
"ELF CONFIG_KCORE_ELF \
Index: linux-2.4.0/arch/m68k/atari/stram.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/m68k/atari/stram.c,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 stram.c
--- linux-2.4.0/arch/m68k/atari/stram.c 2000/12/13 05:12:51 1.1.1.2
+++ linux-2.4.0/arch/m68k/atari/stram.c 2001/01/08 04:41:43
@@ -642,7 +642,8 @@
set_pte(dir, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
swap_free(entry);
get_page(page);
- ++vma->vm_mm->rss;
+ if (++vma->vm_mm->rss > vma->vm_mm->maxrss)
+ vma->vm_mm->maxrss = vma->vm_mm->rss;
}

static inline void unswap_pmd(struct vm_area_struct * vma, pmd_t *dir,
Index: linux-2.4.0/arch/mips/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/mips/config.in,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 config.in
--- linux-2.4.0/arch/mips/config.in 2000/12/13 00:26:37 1.1.1.2
+++ linux-2.4.0/arch/mips/config.in 2001/01/08 04:41:43
@@ -168,6 +168,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi

source drivers/parport/Config.in

Index: linux-2.4.0/arch/mips64/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/mips64/config.in,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 config.in
--- linux-2.4.0/arch/mips64/config.in 2000/12/13 05:22:46 1.1.1.3
+++ linux-2.4.0/arch/mips64/config.in 2001/01/08 04:41:43
@@ -104,6 +104,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
tristate 'Kernel support for 64-bit ELF binaries' CONFIG_BINFMT_ELF
bool 'Kernel support for Linux/MIPS 32-bit binary compatibility' CONFIG_MIPS32_COMPAT
if [ "$CONFIG_MIPS32_COMPAT" = "y" ]; then
Index: linux-2.4.0/arch/ppc/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/ppc/config.in,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 config.in
--- linux-2.4.0/arch/ppc/config.in 2000/12/13 00:28:43 1.1.1.3
+++ linux-2.4.0/arch/ppc/config.in 2001/01/08 04:41:43
@@ -118,6 +118,10 @@

bool 'Networking support' CONFIG_NET
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT

Index: linux-2.4.0/arch/s390/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/s390/config.in,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 config.in
--- linux-2.4.0/arch/s390/config.in 2000/12/13 00:47:02 1.1.1.3
+++ linux-2.4.0/arch/s390/config.in 2001/01/08 04:41:43
@@ -44,6 +44,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
tristate 'Kernel support for ELF binaries' CONFIG_BINFMT_ELF

endmenu
Index: linux-2.4.0/arch/sh/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/sh/config.in,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 config.in
--- linux-2.4.0/arch/sh/config.in 2001/01/07 21:44:52 1.1.1.3
+++ linux-2.4.0/arch/sh/config.in 2001/01/08 04:41:43
@@ -129,6 +129,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
if [ "$CONFIG_PROC_FS" = "y" ]; then
choice 'Kernel core (/proc/kcore) format' \
"ELF CONFIG_KCORE_ELF \
Index: linux-2.4.0/arch/sparc/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/sparc/config.in,v
retrieving revision 1.1.1.4
diff -u -b -u -r1.1.1.4 config.in
--- linux-2.4.0/arch/sparc/config.in 2000/12/13 05:04:31 1.1.1.4
+++ linux-2.4.0/arch/sparc/config.in 2001/01/08 04:41:43
@@ -59,6 +59,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
if [ "$CONFIG_PROC_FS" = "y" ]; then
define_bool CONFIG_KCORE_ELF y
fi
Index: linux-2.4.0/arch/sparc64/config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/arch/sparc64/config.in,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 config.in
--- linux-2.4.0/arch/sparc64/config.in 2000/12/13 00:36:42 1.1.1.3
+++ linux-2.4.0/arch/sparc64/config.in 2001/01/08 04:41:43
@@ -51,6 +51,10 @@
bool 'System V IPC' CONFIG_SYSVIPC
bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
bool 'Sysctl support' CONFIG_SYSCTL
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'RSS Softlimits (EXPERIMENTAL)' CONFIG_RSS_SOFTLIMIT
+ bool 'RSS Hardlimits (EXPERIMENTAL)' CONFIG_RSS_HARDLIMIT
+fi
if [ "$CONFIG_PROC_FS" = "y" ]; then
define_bool CONFIG_KCORE_ELF y
fi
Index: linux-2.4.0/drivers/acpi/include/acgcc.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/include/acgcc.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/include/acgcc.h 2001/01/07 21:44:56 1.1.1.2
+++ linux-2.4.0/drivers/acpi/include/acgcc.h 2001/01/04 23:30:27 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Name: acgcc.h - GCC specific defines, etc.
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/include/aclinux.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/include/aclinux.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/include/aclinux.h 2001/01/07 21:44:56 1.1.1.2
+++ linux-2.4.0/drivers/acpi/include/aclinux.h 2001/01/04 23:30:27 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Name: aclinux.h - OS specific defines, etc.
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/include/actbl1.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/include/actbl1.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/include/actbl1.h 2001/01/07 21:44:56 1.1.1.2
+++ linux-2.4.0/drivers/acpi/include/actbl1.h 2001/01/04 23:30:27 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Name: actbl1.h - ACPI 1.0 tables
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/include/actbl2.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/include/actbl2.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/include/actbl2.h 2001/01/07 21:44:56 1.1.1.2
+++ linux-2.4.0/drivers/acpi/include/actbl2.h 2001/01/04 23:30:27 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Name: actbl2.h - ACPI Specification Revision 2.0 Tables
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/include/actbl71.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/include/actbl71.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/include/actbl71.h 2001/01/07 21:44:56 1.1.1.2
+++ linux-2.4.0/drivers/acpi/include/actbl71.h 2001/01/04 23:30:24 1.1.1.1
@@ -3,7 +3,7 @@
* Name: actbl71.h - IA-64 Extensions to the ACPI Spec Rev. 0.71
* This file includes tables specific to this
* specification revision.
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/namespace/nsinit.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/namespace/nsinit.c,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/namespace/nsinit.c 2001/01/07 21:44:56 1.1.1.2
+++ linux-2.4.0/drivers/acpi/namespace/nsinit.c 2001/01/04 23:30:33 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Module Name: nsinit - namespace initialization
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/tables/tbconvrt.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/tables/tbconvrt.c,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/tables/tbconvrt.c 2001/01/07 21:44:57 1.1.1.2
+++ linux-2.4.0/drivers/acpi/tables/tbconvrt.c 2001/01/04 23:30:38 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Module Name: tbconvrt - ACPI Table conversion utilities
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/acpi/tables/tbxfroot.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/acpi/tables/tbxfroot.c,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/acpi/tables/tbxfroot.c 2001/01/07 21:44:57 1.1.1.2
+++ linux-2.4.0/drivers/acpi/tables/tbxfroot.c 2001/01/04 23:30:37 1.1.1.1
@@ -1,7 +1,7 @@
/******************************************************************************
*
* Module Name: tbxfroot - Find the root ACPI table (RSDT)
- * $Revision: 1.1.1.2 $
+ * $Revision: 1.1.1.1 $
*
*****************************************************************************/

Index: linux-2.4.0/drivers/scsi/README.osst
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/scsi/README.osst,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/scsi/README.osst 2001/01/07 21:45:39 1.1.1.2
+++ linux-2.4.0/drivers/scsi/README.osst 2001/01/04 23:22:35 1.1.1.1
@@ -189,7 +189,7 @@
#!/bin/sh
# Script to create OnStream SC-x0 device nodes (major 206)
# Usage: Makedevs.sh [nos [path to dev]]
-# $Id: README.osst,v 1.1.1.2 2001/01/07 21:45:39 peterc Exp $
+# $Id: README.osst,v 1.1.1.1 2001/01/04 23:22:35 peterc Exp $
major=206
nrs=4
dir=/dev
Index: linux-2.4.0/drivers/scsi/osst.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst.c,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 osst.c
--- linux-2.4.0/drivers/scsi/osst.c 2001/01/07 21:45:39 1.1.1.2
+++ linux-2.4.0/drivers/scsi/osst.c 2001/01/08 04:41:46
@@ -16,14 +16,14 @@
Copyright 1992 - 2000 Kai Makisara
email Kai.Makisara@metla.fi

- $Header: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst.c,v 1.1.1.2 2001/01/07 21:45:39 peterc Exp $
+ $Header: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst.c,v 1.1.1.1 2001/01/04 23:22:39 peterc Exp $

Microscopic alterations - Rik Ling, 2000/12/21
Last modified: Wed Feb 2 22:04:05 2000 by makisara@kai.makisara.local
Some small formal changes - aeb, 950809
*/

-static const char * cvsid = "$Id: osst.c,v 1.1.1.2 2001/01/07 21:45:39 peterc Exp $";
+static const char * cvsid = "$Id: osst.c,v 1.1.1.1 2001/01/04 23:22:39 peterc Exp $";
const char * osst_version = "0.9.4.3";

/* The "failure to reconnect" firmware bug */
Index: linux-2.4.0/drivers/scsi/osst.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/scsi/osst.h 2001/01/07 21:45:39 1.1.1.2
+++ linux-2.4.0/drivers/scsi/osst.h 2001/01/04 23:22:39 1.1.1.1
@@ -1,5 +1,5 @@
/*
- * $Header: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst.h,v 1.1.1.2 2001/01/07 21:45:39 peterc Exp $
+ * $Header: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst.h,v 1.1.1.1 2001/01/04 23:22:39 peterc Exp $
*/

#include <asm/byteorder.h>
Index: linux-2.4.0/drivers/scsi/osst_options.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst_options.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.1
diff -u -b -u -r1.1.1.2 -r1.1.1.1
--- linux-2.4.0/drivers/scsi/osst_options.h 2001/01/07 21:45:39 1.1.1.2
+++ linux-2.4.0/drivers/scsi/osst_options.h 2001/01/04 23:22:39 1.1.1.1
@@ -8,7 +8,7 @@
Changed (and renamed) for OnStream SCSI drives garloff@suse.de
2000-06-21

- $Header: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst_options.h,v 1.1.1.2 2001/01/07 21:45:39 peterc Exp $
+ $Header: /wrk/CVSROOT/linux-2.4/drivers/scsi/osst_options.h,v 1.1.1.1 2001/01/04 23:22:39 peterc Exp $
*/

#ifndef _OSST_OPTIONS_H
Index: linux-2.4.0/fs/Config.in
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/fs/Config.in,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 Config.in
--- linux-2.4.0/fs/Config.in 2000/12/12 21:49:13 1.1.1.2
+++ linux-2.4.0/fs/Config.in 2001/01/08 04:41:51
@@ -43,6 +43,10 @@

bool '/proc file system support' CONFIG_PROC_FS

+if [ "$CONFIG_PROC_FS" = "y" -a "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool 'Support for /proc/pid/rss? (EXPERIMENTAL)' CONFIG_PROC_RSS
+fi
+
dep_bool '/dev file system support (EXPERIMENTAL)' CONFIG_DEVFS_FS $CONFIG_EXPERIMENTAL
dep_bool ' Automatically mount at boot' CONFIG_DEVFS_MOUNT $CONFIG_DEVFS_FS
dep_bool ' Debug devfs' CONFIG_DEVFS_DEBUG $CONFIG_DEVFS_FS
Index: linux-2.4.0/fs/exec.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/fs/exec.c,v
retrieving revision 1.1.1.6
diff -u -b -u -r1.1.1.6 exec.c
--- linux-2.4.0/fs/exec.c 2001/01/07 21:45:49 1.1.1.6
+++ linux-2.4.0/fs/exec.c 2001/01/08 04:41:52
@@ -321,7 +321,8 @@
struct page *page = bprm->page[i];
if (page) {
bprm->page[i] = NULL;
- current->mm->rss++;
+ if (++current->mm->rss > current->mm->maxrss)
+ current->mm->maxrss = current->mm->rss;
put_dirty_page(current,page,stack_base);
}
stack_base += PAGE_SIZE;
Index: linux-2.4.0/fs/proc/Makefile
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/fs/proc/Makefile,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 Makefile
--- linux-2.4.0/fs/proc/Makefile 2001/01/04 23:03:09 1.1.1.2
+++ linux-2.4.0/fs/proc/Makefile 2001/01/08 04:41:52
@@ -14,8 +14,7 @@
obj-y := inode.o root.o base.o generic.o array.o \
kmsg.o proc_tty.o proc_misc.o kcore.o procfs_syms.o

-ifeq ($(CONFIG_PROC_DEVICETREE),y)
-obj-y += proc_devtree.o
-endif
+obj-$(CONFIG_PROC_DEVICETREE) += proc_devtree.o
+obj-$(CONFIG_PROC_RSS) += rss.o

include $(TOPDIR)/Rules.make
Index: linux-2.4.0/fs/proc/base.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/fs/proc/base.c,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 base.c
--- linux-2.4.0/fs/proc/base.c 2000/12/12 21:49:25 1.1.1.3
+++ linux-2.4.0/fs/proc/base.c 2001/01/08 04:41:52
@@ -11,6 +11,8 @@
* go into icache. We cache the reference to task_struct upon lookup too.
* Eventually it should become a filesystem in its own. We don't use the
* rest of procfs anymore.
+ *
+ * Added support for /proc/<pid>/rss, 20.01.2000, Kingsley Cheung *
*/

#include <asm/uaccess.h>
@@ -39,6 +41,10 @@
int proc_pid_status(struct task_struct*,char*);
int proc_pid_statm(struct task_struct*,char*);
int proc_pid_cpu(struct task_struct*,char*);
+#ifdef CONFIG_PROC_RSS
+int proc_pid_rss_read(struct task_struct*,char*);
+ssize_t proc_pid_rss_write(struct task_struct*,struct file*,char*,size_t,loff_t*);
+#endif

static int proc_fd_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
{
@@ -309,6 +315,14 @@
read: proc_info_read,
};

+#ifdef CONFIG_PROC_RSS
+static struct file_operations proc_rss_file_operations = {
+ read: proc_info_read,
+ write: proc_pid_rss_write,
+};
+#endif
+
+
#define MAY_PTRACE(p) \
(p==current||(p->p_pptr==current&&(p->ptrace & PT_PTRACED)&&p->state==TASK_STOPPED))

@@ -495,6 +509,9 @@
PROC_PID_STATM,
PROC_PID_MAPS,
PROC_PID_CPU,
+#ifdef CONFIG_PROC_RSS
+ PROC_PID_RSS,
+#endif /* CONFIG_PROC_RSS */
PROC_PID_FD_DIR = 0x8000, /* 0x8000-0xffff */
};

@@ -514,6 +531,9 @@
E(PROC_PID_CWD, "cwd", S_IFLNK|S_IRWXUGO),
E(PROC_PID_ROOT, "root", S_IFLNK|S_IRWXUGO),
E(PROC_PID_EXE, "exe", S_IFLNK|S_IRWXUGO),
+#ifdef CONFIG_PROC_RSS
+ E(PROC_PID_RSS, "rss", S_IFREG|S_IRUGO|S_IWUSR),
+#endif
{0,0,NULL,0}
};
#undef E
@@ -860,6 +880,12 @@
inode->i_op = &proc_mem_inode_operations;
inode->i_fop = &proc_mem_operations;
break;
+#ifdef CONFIG_PROC_RSS
+ case PROC_PID_RSS:
+ inode->i_fop = &proc_info_file_operations;
+ inode->u.proc_i.op.proc_read = proc_pid_rss_read;
+ break;
+#endif
default:
printk("procfs: impossible type (%d)",p->type);
iput(inode);
Index: linux-2.4.0/include/linux/sched.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/include/linux/sched.h,v
retrieving revision 1.1.1.6
diff -u -b -u -r1.1.1.6 sched.h
--- linux-2.4.0/include/linux/sched.h 2001/01/07 21:46:10 1.1.1.6
+++ linux-2.4.0/include/linux/sched.h 2001/01/08 04:41:55
@@ -216,7 +216,9 @@
unsigned long start_code, end_code, start_data, end_data;
unsigned long start_brk, brk, start_stack;
unsigned long arg_start, arg_end, env_start, env_end;
- unsigned long rss, total_vm, locked_vm;
+ unsigned long rss;
+ unsigned long maxrss, rss_limit;
+ unsigned long total_vm, locked_vm;
unsigned long def_flags;
unsigned long cpu_vm_mask;
unsigned long swap_cnt; /* number of pages to swap on next pass */
@@ -351,6 +353,14 @@
/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
unsigned long min_flt, maj_flt, nswap, cmin_flt, cmaj_flt, cnswap;
int swappable:1;
+/* #if CONFIG_PROC_RSS keep same size, but do we remove ifdefs in fork too? */
+/* major and minor page fault rates and time of occurence */
+ unsigned long maj_flt_rate, min_flt_rate; /* in pages per second */
+ unsigned long maj_flt_time, min_flt_time; /* in seconds */
+/* #endif */
+/* rss statistics -- maxrss is in the struct mm */
+ unsigned long irss;
+ unsigned long cmaxrss, cirss;
/* process credentials */
uid_t uid,euid,suid,fsuid;
gid_t gid,egid,sgid,fsgid;
Index: linux-2.4.0/include/linux/swap.h
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/include/linux/swap.h,v
retrieving revision 1.1.1.4
diff -u -b -u -r1.1.1.4 swap.h
--- linux-2.4.0/include/linux/swap.h 2001/01/04 23:06:01 1.1.1.4
+++ linux-2.4.0/include/linux/swap.h 2001/01/08 04:41:55
@@ -109,6 +109,9 @@
extern int inactive_shortage(void);
extern void wakeup_kswapd(int);
extern int try_to_free_pages(unsigned int gfp_mask);
+#ifdef CONFIG_RSS_HARDLIMIT
+extern int try_to_swap_out_page(unsigned int gfp_mask);
+#endif

/* linux/mm/page_io.c */
extern void rw_swap_page(int, struct page *, int);
Index: linux-2.4.0/kernel/exit.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/kernel/exit.c,v
retrieving revision 1.1.1.5
diff -u -b -u -r1.1.1.5 exit.c
--- linux-2.4.0/kernel/exit.c 2001/01/07 21:46:13 1.1.1.5
+++ linux-2.4.0/kernel/exit.c 2001/01/08 04:41:56
@@ -49,6 +49,8 @@
current->cmin_flt += p->min_flt + p->cmin_flt;
current->cmaj_flt += p->maj_flt + p->cmaj_flt;
current->cnswap += p->nswap + p->cnswap;
+ if (p->cmaxrss > current->cmaxrss)
+ current->cmaxrss = p->cmaxrss;
/*
* Potentially available timeslices are retrieved
* here - this way the parent does not get penalized
@@ -308,6 +310,14 @@
if (mm != tsk->active_mm) BUG();
/* more a memory barrier than a real lock */
task_lock(tsk);
+ /*
+ * can't do this at wait() time, because mm is gone by then.
+ */
+ if (tsk->p_pptr) {
+ if (mm->maxrss > tsk->p_pptr->cmaxrss)
+ tsk->p_pptr->cmaxrss = mm->maxrss;
+ }
+
tsk->mm = NULL;
task_unlock(tsk);
enter_lazy_tlb(mm, current, smp_processor_id());
Index: linux-2.4.0/kernel/fork.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/kernel/fork.c,v
retrieving revision 1.1.1.5
diff -u -b -u -r1.1.1.5 fork.c
--- linux-2.4.0/kernel/fork.c 2001/01/07 21:46:13 1.1.1.5
+++ linux-2.4.0/kernel/fork.c 2001/01/08 04:41:56
@@ -202,6 +202,7 @@
atomic_set(&mm->mm_users, 1);
atomic_set(&mm->mm_count, 1);
init_MUTEX(&mm->mmap_sem);
+ mm->maxrss = mm->rss;
mm->page_table_lock = SPIN_LOCK_UNLOCKED;
mm->pgd = pgd_alloc();
if (mm->pgd)
@@ -284,6 +285,12 @@
tsk->min_flt = tsk->maj_flt = 0;
tsk->cmin_flt = tsk->cmaj_flt = 0;
tsk->nswap = tsk->cnswap = 0;
+ tsk->irss = 0;
+ tsk->cmaxrss = tsk->cirss = 0;
+#if CONFIG_PROC_RSS
+ tsk->maj_flt_time = tsk->min_flt_time = tsk->start_time / HZ;
+ tsk->maj_flt_rate = tsk->min_flt_rate = 0;
+#endif

tsk->mm = NULL;
tsk->active_mm = NULL;
Index: linux-2.4.0/kernel/sys.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/kernel/sys.c,v
retrieving revision 1.1.1.2
diff -u -b -u -r1.1.1.2 sys.c
--- linux-2.4.0/kernel/sys.c 2000/11/25 02:56:24 1.1.1.2
+++ linux-2.4.0/kernel/sys.c 2001/01/08 04:41:56
@@ -1077,6 +1077,10 @@
return -EPERM;
}
*old_rlim = new_rlim;
+
+ if (resource == RLIMIT_RSS && current->mm != &init_mm)
+ current->mm->rss_limit = (new_rlim.rlim_cur == RLIM_INFINITY) ? ULONG_MAX : (new_rlim.rlim_cur >> PAGE_SHIFT);
+
return 0;
}

@@ -1111,6 +1115,10 @@
r.ru_minflt = p->min_flt;
r.ru_majflt = p->maj_flt;
r.ru_nswap = p->nswap;
+ r.ru_maxrss = p->mm->maxrss;
+ r.ru_ixrss = 0;
+ r.ru_idrss = p->irss;
+ r.ru_isrss = 0;
break;
case RUSAGE_CHILDREN:
r.ru_utime.tv_sec = CT_TO_SECS(p->times.tms_cutime);
@@ -1120,6 +1128,10 @@
r.ru_minflt = p->cmin_flt;
r.ru_majflt = p->cmaj_flt;
r.ru_nswap = p->cnswap;
+ r.ru_maxrss = p->cmaxrss;
+ r.ru_ixrss = 0;
+ r.ru_idrss = p->cirss;
+ r.ru_isrss = 0;
break;
default:
r.ru_utime.tv_sec = CT_TO_SECS(p->times.tms_utime + p->times.tms_cutime);
@@ -1129,6 +1141,10 @@
r.ru_minflt = p->min_flt + p->cmin_flt;
r.ru_majflt = p->maj_flt + p->cmaj_flt;
r.ru_nswap = p->nswap + p->cnswap;
+ r.ru_maxrss = p->mm->maxrss > p->cmaxrss ? p->mm->maxrss : p->cmaxrss;
+ r.ru_ixrss = 0;
+ r.ru_idrss = p->irss + p->cirss;
+ r.ru_isrss = 0;
break;
}
return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
Index: linux-2.4.0/kernel/timer.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/kernel/timer.c,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 timer.c
--- linux-2.4.0/kernel/timer.c 2000/12/13 02:41:08 1.1.1.3
+++ linux-2.4.0/kernel/timer.c 2001/01/08 04:41:56
@@ -567,6 +567,9 @@
{
p->per_cpu_utime[cpu] += user;
p->per_cpu_stime[cpu] += system;
+ if (p->mm)
+ p->irss += p->mm->rss;
+
do_process_times(p, user, system);
do_it_virt(p, user);
do_it_prof(p);
Index: linux-2.4.0/mm/filemap.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/mm/filemap.c,v
retrieving revision 1.1.1.6
diff -u -b -u -r1.1.1.6 filemap.c
--- linux-2.4.0/mm/filemap.c 2001/01/07 21:46:13 1.1.1.6
+++ linux-2.4.0/mm/filemap.c 2001/01/08 04:41:57
@@ -1967,8 +1967,12 @@

/* Make sure this doesn't exceed the process's max rss. */
error = -EIO;
+#if defined(CONFIG_RSS_HARDLIMIT) || defined(CONFIG_RSS_SOFTLIMIT)
+ rlim_rss = vma->vm_mm->rss_limit;
+#else
rlim_rss = current->rlim ? current->rlim[RLIMIT_RSS].rlim_cur :
LONG_MAX; /* default: see resource.h */
+#endif
if ((vma->vm_mm->rss + (end - start)) > rlim_rss)
return error;

Index: linux-2.4.0/mm/memory.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/mm/memory.c,v
retrieving revision 1.1.1.6
diff -u -b -u -r1.1.1.6 memory.c
--- linux-2.4.0/mm/memory.c 2001/01/07 21:46:13 1.1.1.6
+++ linux-2.4.0/mm/memory.c 2001/01/08 04:41:57
@@ -872,7 +872,8 @@
*/
if (pte_same(*page_table, pte)) {
if (PageReserved(old_page))
- ++mm->rss;
+ if (++mm->rss > mm->maxrss)
+ mm->maxrss = mm->rss;
break_cow(vma, old_page, new_page, address, page_table);

/* Free the old page.. */
@@ -1019,9 +1020,15 @@
struct vm_area_struct * vma, unsigned long address,
pte_t * page_table, swp_entry_t entry, int write_access)
{
- struct page *page = lookup_swap_cache(entry);
+ struct page *page;
pte_t pte;

+#ifdef CONFIG_RSS_HARDLIMIT
+ if (mm->rss >= mm->rss_limit)
+ try_to_shrink_rss(mm, GFP_USER);
+#endif
+
+ page = lookup_swap_cache(entry);
if (!page) {
lock_kernel();
swapin_readahead(entry);
@@ -1034,7 +1041,8 @@
flush_icache_page(vma, page);
}

- mm->rss++;
+ if (++mm->rss > mm->maxrss)
+ mm->maxrss = mm->rss;

pte = mk_pte(page, vma->vm_page_prot);

@@ -1062,13 +1070,18 @@
{
struct page *page = NULL;
pte_t entry = pte_wrprotect(mk_pte(ZERO_PAGE(addr), vma->vm_page_prot));
+#ifdef CONFIG_RSS_HARDLIMIT
+ if (mm->rss > mm->rss_limit)
+ try_to_shrink_rss(mm, GFP_USER);
+#endif
if (write_access) {
page = alloc_page(GFP_HIGHUSER);
if (!page)
return -1;
clear_user_highpage(page, addr);
entry = pte_mkwrite(pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
- mm->rss++;
+ if (++mm->rss > mm->maxrss)
+ mm->maxrss = mm->rss;
flush_page_to_ram(page);
}
set_pte(page_table, entry);
@@ -1107,7 +1120,8 @@
return 0;
if (new_page == NOPAGE_OOM)
return -1;
- ++mm->rss;
+ if (++mm->rss > mm->maxrss)
+ mm->maxrss = mm->rss;
/*
* This silly early PAGE_DIRTY setting removes a race
* due to the bad i386 page protection. But it's valid
Index: linux-2.4.0/mm/swapfile.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/mm/swapfile.c,v
retrieving revision 1.1.1.3
diff -u -b -u -r1.1.1.3 swapfile.c
--- linux-2.4.0/mm/swapfile.c 2001/01/04 23:05:35 1.1.1.3
+++ linux-2.4.0/mm/swapfile.c 2001/01/08 04:41:58
@@ -231,7 +231,8 @@
set_pte(dir, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
swap_free(entry);
get_page(page);
- ++vma->vm_mm->rss;
+ if (++vma->vm_mm->rss > vma->vm_mm->maxrss)
+ vma->vm_mm->maxrss = vma->vm_mm->rss;
}

static inline void unuse_pmd(struct vm_area_struct * vma, pmd_t *dir,
Index: linux-2.4.0/mm/vmscan.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/mm/vmscan.c,v
retrieving revision 1.1.1.6
diff -u -b -u -r1.1.1.6 vmscan.c
--- linux-2.4.0/mm/vmscan.c 2001/01/07 21:46:13 1.1.1.6
+++ linux-2.4.0/mm/vmscan.c 2001/01/08 04:41:58
@@ -294,6 +294,96 @@
return result;
}

+#if CONFIG_RSS_SOFTLIMIT
+int krssd(void *unused)
+{
+ struct task_struct *tsk = current;
+#define MAX_NPROCS 10
+ pid_t procs[MAX_NPROCS];
+ struct task_struct *p, *oldp;
+ unsigned long rss;
+ int nprocs, i;
+
+ nprocs = 0;
+ (void)unused;
+
+
+ tsk->session = 1;
+ tsk->pgrp = 1;
+ strcpy(tsk->comm, "krssd");
+ sigfillset(&tsk->blocked);
+
+ printk("Starting krssd\n");
+
+ for (;;) {
+
+ /*
+ * Try not to wake up at the same time every second.
+ */
+ tsk->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HZ + 3);
+
+ /*
+ * Find up to MAX_NPROCS processes that exceed their RSS
+ * limit and attempt to shrink them.
+ * Save the PIDs of any over-limit processes in an array,
+ * so that swap_out_mm can sleep (processes can
+ * die while we're asleep)
+ * Using PIDS rather than proc_t pointers also
+ * reduces the time holding tasklist_lock.
+ */
+ read_lock(&tasklist_lock);
+
+ /* select next processes to scan */
+ oldp = NULL;
+ while (nprocs && !(oldp = find_task_by_pid(procs[--nprocs])))
+ ;
+
+ /* select init if no process found */
+ if (!oldp)
+ oldp = &init_task;
+
+ /* choose at most next MAX_NPROCS */
+ nprocs = 0; p = oldp;
+ while ((p = p->next_task) != oldp && nprocs < MAX_NPROCS)
+ if (p != &init_task && p->swappable && p->mm &&
+ p->mm->rss > p->mm->rss_limit)
+ procs[nprocs++] = p->pid;
+ read_unlock(&tasklist_lock);
+
+ /* Attempt to shrink RSS till under limit */
+ for (i = 0; i < nprocs; i ++) {
+ struct mm_struct *mm;
+ read_lock(&tasklist_lock);
+ p = find_task_by_pid(procs[i]);
+ if (p && (mm = p->mm))
+ atomic_inc(&mm->mm_count);
+ read_unlock(&tasklist_lock);
+
+ if (!p)
+ continue;
+
+ /*
+ * If pages are freed from the process but
+ * are still in use elsewhere,
+ * swap_out_process may return 0
+ * but still shrink rss.
+ * Keep calling it until it cannot do any more work,
+ * or the limit is no longer exceeded.
+ * TODO: think about hysteresis --- track
+ * persistent offenders and reduce RSS even further
+ */
+ while ((rss = mm->rss) > mm->rss_limit &&
+ (swap_out_mm(mm, GFP_KSWAPD) ||
+ rss != mm->rss))
+ ;
+ mmdrop(mm);
+ }
+ }
+}
+
+#endif /* CONFIG_RSS_SOFTLIMIT */
+
/*
* Select the task with maximal swap_cnt and try to swap out a page.
* N.B. This function returns only 0 or 1. Return values != 1 from
@@ -1149,7 +1239,17 @@
swap_setup();
kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGNAL);
kernel_thread(kreclaimd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGNAL);
+#ifdef CONFIG_RSS_SOFTLIMIT
+ kernel_thread(krssd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGNAL);
+#endif
return 0;
}
+
+#ifdef CONFIG_RSS_HARDLIMIT
+void try_to_shrink_rss(struct mm_struct *mm, int gfp_mask)
+{
+ swap_out_mm(mm, gfp_mask);
+}
+#endif

module_init(kswapd_init)
Index: linux-2.4.0/fs/proc/rss.c
===================================================================
RCS file: /wrk/CVSROOT/linux-2.4/fs/proc/rss.c
retrieving revision 1.1
diff -u -b -u -r1.1 rss.c
--- /dev/null Wed May 6 06:32:27 1998
+++ linux-2.4.0/fs/proc/rss.c Mon Jan 8 15:31:22 2001
@@ -0,0 +1,239 @@
+/* fs/proc/rss.c
+ *
+ * 15 March 2000, Kingsley Cheung
+ * Support added for page fault calculation and /proc/pid/rss.
+ */
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/resource.h>
+#include <linux/rss.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+
+
+/*
+ * Below is a table of constants for ((k-1)/k)^n = (4/5)^n, where k is
+ * 5 seconds, n is [0..34] seconds. For n >= 35, (4/5)^n = 0.0
+ * These constants are scaled by 1000, as are the page fault
+ * rates displayed in /proc/<pid>/rss.
+ */
+
+unsigned long mov_ave_table[MOV_AVE_TABLE_SIZE] =
+{ 1000, 800, 640, 512, 410, 328, 262, 210, 168, 134, 107, 86,
+ 69, 55, 44, 35, 28, 23, 18, 14, 12, 9, 7, 6, 5, 4,
+ 3, 2, 2, 2, 1, 1, 1, 1, 1 };
+
+
+
+
+/* Support for /proc/<pid>/rss
+ *
+ * pid_rss_read can integrated into array_read in fs/proc/array.c, but
+ * since we are required to support writing, we have a different set
+ * of file operations.
+ *
+ * The data listed is the following:
+ * - current RSS limit
+ * - maximum RSS limit
+ * - RSS
+ * - major fault rate
+ * - minor fault rate
+ *
+ * Reading /proc/<pid>/rss is allowed only once through an open
+ * descriptor. To obtain more recent data, the file must be
+ * closed and opened again. The file is readable by all everyone.
+ */
+
+int proc_pid_rss_read(struct task_struct *tsk, char *buf)
+{
+ int count;
+ task_lock(tsk);
+
+ /* recalculate page fault rates due to decay */
+ decay_flt_rate(&(tsk->maj_flt_rate), &(tsk->maj_flt_time));
+ decay_flt_rate(&(tsk->min_flt_rate), &(tsk->min_flt_time));
+
+ count = sprintf(buf,
+ "%ld %ld %lu %lu %lu\n",
+ tsk->rlim[RLIMIT_RSS].rlim_cur >> PAGE_SHIFT,
+ tsk->rlim[RLIMIT_RSS].rlim_max >> PAGE_SHIFT,
+ tsk->mm ? tsk->mm->rss : 0,
+ tsk->maj_flt_rate,
+ tsk->min_flt_rate);
+
+ task_unlock(tsk);
+ return count;
+}
+
+
+
+#define skip_space(buffer) \
+do { \
+ while (*(buffer) && isspace(*(buffer))) \
+ (buffer)++; \
+} while(0)
+
+
+static int get_unsigned_numbers(const char *buf, unsigned long *numbers, int count)
+/* Pre: 'numbers' is array of longs of length 'count'
+ * Post: returns number of integers read and sets values in numbers
+ * returns -1 whenever non-digit or white-space encountered
+ */
+{
+ char *p; int i, neg;
+
+ /* loop and get integers, assuming all are in the buffer */
+ for (p = (char *) buf, i = 0; i < count && *p; i++) {
+ /* skip whitespace */
+ skip_space(p);
+ if (!(*p))
+ break;
+
+ /* test for negative values */
+ neg = 0;
+ if (*p == '-' && isdigit(*(p+1))) {
+ neg = 1; p++;
+ }
+
+ /* convert number */
+ numbers[i] = simple_strtoul(p, &p, 0);
+ if (neg)
+ numbers[i] = - numbers[i];
+
+ if (*p && !isspace(*p))
+ return -1;
+ }
+
+ /* ensure remaining numbers are non-white space */
+ skip_space(p);
+ if (*p)
+ return -1;
+
+ return i;
+}
+
+
+#define bad_rss_limit(new_limit) \
+((new_limit) < 0 || (new_limit) > RLIM_INFINITY)
+
+#define getnextline(buf) \
+({ \
+ while (*(buf)) \
+ (buf)++; \
+ (buf)++; \
+})
+
+
+/*
+ * Only the user has write permission to proc/<pid>/rss. The contents
+ * that may be written to it specify the current and maximum RSS limits
+ * the user wishes to set for that process. The contents written to the
+ * pseudo file must adhere to the following:
+ *
+ * 1. There can be at most two numbers per line: the new current
+ * RSS limit followed by whitespace and the new maximum RSS
+ * limit.
+ *
+ * 2. Whenever one number is specified on a line, the number is
+ * interpreted as the new current RSS limit.
+ *
+ * 3. The current RSS limit must never exceed the maximum RSS
+ * limit.
+ *
+ * 4. The maximum RSS limit cannot be increased except by
+ * processes with system resource capabilities.
+ *
+ * 5. The limits must lie between the range 0 and
+ * RLIM_INFINITY / PAGE_SIZE inclusive.
+ *
+ * Violation of these rules will produce invalid or write permission
+ * errors. Attempts to write to /proc/<pid>/rss for non-existent
+ * processes will produce an I/O error.
+ *
+ * Writing to /proc/<pid>/rss can continue forever through an open
+ * descriptor as long as one abides by the rules stated above.
+ * Currently, ppos is not used to limit the number of characters
+ * written.
+ */
+
+ssize_t proc_pid_rss_write(struct task_struct *tsk, struct file *file, const char *buf, size_t count, loff_t *ppos)
+{
+ struct rlimit new_rss;
+ unsigned long numbers[2];
+
+ char *page, *p;
+ int res, ret;
+
+ /* buffer to write to */
+ if (!(page = (char * ) __get_free_page(GFP_KERNEL)))
+ return -ENOMEM;
+
+ /* read user buffer up to one page only */
+ if (count > PAGE_SIZE - 1)
+ count = PAGE_SIZE - 1;
+
+ ret = count;
+
+ if (copy_from_user(page, buf, count))
+ return -EFAULT;
+
+ page[count] = 0;
+ for (p = page; *p; p++)
+ if (*p == '\n')
+ *p = 0;
+
+ /* obtain process current rss limits */
+ new_rss = tsk->rlim[RLIMIT_RSS];
+
+ /* for each line, read at most two integers */
+ for (p = page; p - page < count; getnextline(p)) {
+ /* read numbers from the line */
+ if ((res = get_unsigned_numbers(p, numbers, 2)) < 0) {
+ ret = -EINVAL;
+ goto pid_rss_end;
+ }
+
+ /* if numbers where read from the line */
+ if (res) {
+ /* assign values of new limits */
+ new_rss.rlim_cur = numbers[0] * PAGE_SIZE;
+ if (res == 2)
+ new_rss.rlim_max = numbers[1] * PAGE_SIZE;
+
+ /* ensure rss limits within defined range */
+ if (bad_rss_limit(new_rss.rlim_cur) ||
+ bad_rss_limit(new_rss.rlim_max) ||
+ new_rss.rlim_cur > new_rss.rlim_max) {
+ ret = -EINVAL;
+ goto pid_rss_end;
+ }
+
+ if (new_rss.rlim_max > tsk->rlim[RLIMIT_RSS].rlim_max
+ && !capable(CAP_SYS_RESOURCE)) {
+ ret = -EPERM;
+ goto pid_rss_end;
+ }
+
+ tsk->rlim[RLIMIT_RSS] = new_rss;
+ if (new_rss.rlim_cur == RLIM_INFINITY)
+ tsk->mm->rss_limit = ULONG_MAX;
+ else
+ tsk->mm->rss_limit = new_rss.rlim_cur >> PAGE_SHIFT;
+ }
+ }
+
+ *ppos += ret;
+ file->f_pos += ret;
+
+pid_rss_end:
+ free_page((unsigned long) page);
+
+ return ret;
+}
-
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