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SubjectRe: [PATCH] processes with shared vm
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Den 17 Aug 2001 03:56:49 -0400, skrev Robert Love:
> On 17 Aug 2001 09:50:06 +0200, Terje Eggestad wrote:
> > I figured out that it's difficult to find out from /proc
> > which processes that share VM (created with clone(CLONE_VM)).
>
> good idea, but use diff -u
>
> --
> Robert M. Love
> rml at ufl.edu
> rml at tech9.net


--- array.c Thu Aug 16 16:33:56 2001
+++ array.c.orig Mon Mar 19 21:34:55 2001
@@ -50,12 +50,6 @@
* Al Viro & Jeff Garzik : moved most of the thing into base.c and
* : proc_misc.c. The rest may eventually go into
* : base.c too.
- *
- * Terje Eggestad : added in /proc/<pid>/status a VmClones: n
- * : that tells how many proc that uses the same VM
(mm_struct).
- * : if there are clones add another field
VmFirstClone with the
- * : clone with the lowest pid. Needed for things
like gtop that adds
- * : mem usage of groups of proc, or else they add
up the usage of threads.
*/

#include <linux/config.h>
@@ -184,7 +178,7 @@
static inline char * task_mem(struct mm_struct *mm, char *buffer)
{
struct vm_area_struct * vma;
- unsigned long data = 0, stack = 0;
+ unsigned long data = 0, stack = 0;
unsigned long exec = 0, lib = 0;

down_read(&mm->mmap_sem);
@@ -212,24 +206,12 @@
"VmData:\t%8lu kB\n"
"VmStk:\t%8lu kB\n"
"VmExe:\t%8lu kB\n"
- "VmLib:\t%8lu kB\n"
- "VmClones:\t%d\n",
+ "VmLib:\t%8lu kB\n",
mm->total_vm << (PAGE_SHIFT-10),
mm->locked_vm << (PAGE_SHIFT-10),
mm->rss << (PAGE_SHIFT-10),
data - stack, stack,
- exec - lib, lib,
- mm->mm_users.counter-2);
- /* if we've vm clones, find the lowest/first pid of the clones
*/
- if (mm->mm_users.counter > 2) {
- struct task_struct *p;
- read_lock(&tasklist_lock);
- for_each_task(p) {
- if (p->mm == mm) break;
- };
- buffer += sprintf(buffer, "VmFirstClone:\t%d\n", p->pid);
- read_unlock(&tasklist_lock);
- };
+ exec - lib, lib);
up_read(&mm->mmap_sem);
return buffer;
}

--
_________________________________________________________________________
Terje Eggestad terje.eggestad@scali.no
Scali Scalable Linux Systems http://www.scali.com

Olaf Helsets Vei 6 tel: +47 22 62 89 61 (OFFICE)
P.O.Box 70 Bogerud +47 975 31 574 (MOBILE)
N-0621 Oslo fax: +47 22 62 89 51
NORWAY
_________________________________________________________________________--- array.c Thu Aug 16 16:33:56 2001
+++ array.c.orig Mon Mar 19 21:34:55 2001
@@ -50,12 +50,6 @@
* Al Viro & Jeff Garzik : moved most of the thing into base.c and
* : proc_misc.c. The rest may eventually go into
* : base.c too.
- *
- * Terje Eggestad : added in /proc/<pid>/status a VmClones: n
- * : that tells how many proc that uses the same VM (mm_struct).
- * : if there are clones add another field VmFirstClone with the
- * : clone with the lowest pid. Needed for things like gtop that adds
- * : mem usage of groups of proc, or else they add up the usage of threads.
*/

#include <linux/config.h>
@@ -184,7 +178,7 @@
static inline char * task_mem(struct mm_struct *mm, char *buffer)
{
struct vm_area_struct * vma;
- unsigned long data = 0, stack = 0;
+ unsigned long data = 0, stack = 0;
unsigned long exec = 0, lib = 0;

down_read(&mm->mmap_sem);
@@ -212,24 +206,12 @@
"VmData:\t%8lu kB\n"
"VmStk:\t%8lu kB\n"
"VmExe:\t%8lu kB\n"
- "VmLib:\t%8lu kB\n"
- "VmClones:\t%d\n",
+ "VmLib:\t%8lu kB\n",
mm->total_vm << (PAGE_SHIFT-10),
mm->locked_vm << (PAGE_SHIFT-10),
mm->rss << (PAGE_SHIFT-10),
data - stack, stack,
- exec - lib, lib,
- mm->mm_users.counter-2);
- /* if we've vm clones, find the lowest/first pid of the clones */
- if (mm->mm_users.counter > 2) {
- struct task_struct *p;
- read_lock(&tasklist_lock);
- for_each_task(p) {
- if (p->mm == mm) break;
- };
- buffer += sprintf(buffer, "VmFirstClone:\t%d\n", p->pid);
- read_unlock(&tasklist_lock);
- };
+ exec - lib, lib);
up_read(&mm->mmap_sem);
return buffer;
}
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