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Subject[patch02/05]: Containers(V2)- Generic Linux kernel changes
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Date
This patch contains changes to generic part of kernel code.  These
changes tracks events like new task creating, task's exit, new page
allocation (both file and anonymous) etc.

Signed-off-by: Rohit Seth <rohitseth@google.com>

fs/inode.c | 3 +++
include/linux/fs.h | 5 +++++
include/linux/mm_inline.h | 4 ++++
include/linux/mm_types.h | 4 ++++
include/linux/sched.h | 6 ++++++
init/Kconfig | 8 ++++++++
kernel/Makefile | 1 +
kernel/exit.c | 2 ++
kernel/fork.c | 9 +++++++++
mm/Makefile | 2 ++
mm/filemap.c | 4 ++++
mm/page_alloc.c | 3 +++
mm/rmap.c | 8 +++++++-
mm/swap.c | 1 +
mm/vmscan.c | 1 +
15 files changed, 60 insertions(+), 1 deletion(-)

--- linux-2.6.18-rc6-mm2.org/include/linux/mm_inline.h 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/include/linux/mm_inline.h 2006-09-14 15:09:08.000000000 -0700
@@ -1,9 +1,11 @@
+#include <linux/container.h>

static inline void
add_page_to_active_list(struct zone *zone, struct page *page)
{
list_add(&page->lru, &zone->active_list);
zone->nr_active++;
+ container_inc_activepage_count(page);
}

static inline void
@@ -23,6 +25,7 @@ add_page_to_inactive_list_tail(struct zo
static inline void
del_page_from_active_list(struct zone *zone, struct page *page)
{
+ container_dec_activepage_count(page);
list_del(&page->lru);
zone->nr_active--;
}
@@ -41,6 +44,7 @@ del_page_from_lru(struct zone *zone, str
if (PageActive(page)) {
__ClearPageActive(page);
zone->nr_active--;
+ container_dec_activepage_count(page);
} else {
zone->nr_inactive--;
}
--- linux-2.6.18-rc6-mm2.org/include/linux/fs.h 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/include/linux/fs.h 2006-09-14 15:09:08.000000000 -0700
@@ -449,6 +449,7 @@ struct address_space_operations {
};

struct backing_dev_info;
+struct container_struct;
struct address_space {
struct inode *host; /* owner: inode, block_device */
struct radix_tree_root page_tree; /* radix tree of all pages */
@@ -465,6 +466,10 @@ struct address_space {
struct backing_dev_info *backing_dev_info; /* device readahead, etc */
spinlock_t private_lock; /* for use by the address_space */
struct list_head private_list; /* ditto */
+#ifdef CONFIG_CONTAINERS
+ struct container_struct *ctn; /* Pointer to container */
+ struct list_head ctn_mapping_list; /* List of files belonging to same container*/
+#endif
struct address_space *assoc_mapping; /* ditto */
} __attribute__((aligned(sizeof(long))));
/*
--- linux-2.6.18-rc6-mm2.org/include/linux/sched.h 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/include/linux/sched.h 2006-09-14 15:09:08.000000000 -0700
@@ -298,6 +298,8 @@ typedef unsigned long mm_counter_t;
(mm)->hiwater_vm = (mm)->total_vm; \
} while (0)

+struct container_struct;
+
struct mm_struct {
struct vm_area_struct * mmap; /* list of VMAs */
struct rb_root mm_rb;
@@ -1046,6 +1048,10 @@ struct task_struct {
#ifdef CONFIG_TASK_DELAY_ACCT
struct task_delay_info *delays;
#endif
+#ifdef CONFIG_CONTAINERS
+ struct container_struct *ctn;
+ struct list_head ctn_task_list; /*List of processes belonging to container */
+#endif
};

static inline pid_t process_group(struct task_struct *tsk)
--- linux-2.6.18-rc6-mm2.org/include/linux/mm_types.h 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/include/linux/mm_types.h 2006-09-14 15:15:30.000000000 -0700
@@ -6,6 +6,7 @@
#include <linux/list.h>
#include <linux/spinlock.h>

+struct container_struct;
struct address_space;

/*
@@ -48,6 +49,9 @@ struct page {
struct list_head lru; /* Pageout list, eg. active_list
* protected by zone->lru_lock !
*/
+#ifdef CONFIG_CONTAINERS
+ struct container_struct *ctn; /* Pointer to container, may be NULL */
+#endif
/*
* On machines where all RAM is mapped into kernel address space,
* we can simply calculate the virtual address. On machines with
--- linux-2.6.18-rc6-mm2.org/mm/filemap.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/mm/filemap.c 2006-09-14 15:09:08.000000000 -0700
@@ -30,6 +30,7 @@
#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/cpuset.h>
+#include <linux/container.h>
#include "filemap.h"
#include "internal.h"

@@ -126,6 +127,7 @@ void __remove_from_page_cache(struct pag
page->mapping = NULL;
mapping->nrpages--;
__dec_zone_page_state(page, NR_FILE_PAGES);
+ container_dec_filepage_count(page);
}
EXPORT_SYMBOL(__remove_from_page_cache);

@@ -461,6 +463,8 @@ int add_to_page_cache(struct page *page,
}
write_unlock_irq(&mapping->tree_lock);
radix_tree_preload_end();
+ if (!error)
+ container_inc_filepage_count(mapping, page);
}
return error;
}
--- linux-2.6.18-rc6-mm2.org/init/Kconfig 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/init/Kconfig 2006-09-18 10:48:08.000000000 -0700
@@ -560,6 +560,14 @@ config STOP_MACHINE
depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU
help
Need stop_machine() primitive.
+
+config CONTAINERS
+ bool "Containers"
+ def_bool y
+ depends on CONFIGFS_FS
+ help
+ This option allows grouping of resources like memory and tasks. It
+ depends on CONFIGFS_FS support in psuedo filesystem.
endmenu

menu "Block layer"
--- linux-2.6.18-rc6-mm2.org/mm/Makefile 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/mm/Makefile 2006-09-14 15:09:08.000000000 -0700
@@ -29,3 +29,5 @@ obj-$(CONFIG_MEMORY_HOTPLUG) += memory_h
obj-$(CONFIG_FS_XIP) += filemap_xip.o
obj-$(CONFIG_MIGRATION) += migrate.o
obj-$(CONFIG_SMP) += allocpercpu.o
+obj-$(CONFIG_CONTAINERS) += container.o container_mm.o
+
--- linux-2.6.18-rc6-mm2.org/mm/page_alloc.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/mm/page_alloc.c 2006-09-14 15:09:08.000000000 -0700
@@ -39,6 +39,7 @@
#include <linux/stop_machine.h>
#include <linux/sort.h>
#include <linux/pfn.h>
+#include <linux/container.h>

#include <asm/tlbflush.h>
#include <asm/div64.h>
@@ -502,6 +503,7 @@ static void free_one_page(struct zone *z
zone->pages_scanned = 0;
__free_one_page(page, zone ,order);
spin_unlock(&zone->lock);
+ container_init_page_ptr(page, NULL);
}

static void __free_pages_ok(struct page *page, unsigned int order)
@@ -798,6 +800,7 @@ static void fastcall free_hot_cold_page(

arch_free_page(page, 0);

+ container_init_page_ptr(page, NULL);
if (PageAnon(page))
page->mapping = NULL;
if (free_pages_check(page))
--- linux-2.6.18-rc6-mm2.org/mm/rmap.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/mm/rmap.c 2006-09-14 15:09:08.000000000 -0700
@@ -53,6 +53,7 @@
#include <linux/rmap.h>
#include <linux/rcupdate.h>
#include <linux/module.h>
+#include <linux/container.h>

#include <asm/tlbflush.h>

@@ -521,6 +522,7 @@ static void __page_set_anon_rmap(struct
* interrupts because it is not modified via interrupt.
*/
__inc_zone_page_state(page, NR_ANON_PAGES);
+ container_inc_page_count(page);
}

/**
@@ -563,8 +565,10 @@ void page_add_new_anon_rmap(struct page
*/
void page_add_file_rmap(struct page *page)
{
- if (atomic_inc_and_test(&page->_mapcount))
+ if (atomic_inc_and_test(&page->_mapcount)) {
__inc_zone_page_state(page, NR_FILE_MAPPED);
+ container_inc_page_count(page);
+ }
}

/**
@@ -598,6 +602,8 @@ void page_remove_rmap(struct page *page)
set_page_dirty(page);
__dec_zone_page_state(page,
PageAnon(page) ? NR_ANON_PAGES : NR_FILE_MAPPED);
+ container_dec_page_count(page);
+
}
}

--- linux-2.6.18-rc6-mm2.org/mm/swap.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/mm/swap.c 2006-09-14 15:09:08.000000000 -0700
@@ -196,6 +196,7 @@ void fastcall lru_cache_add_active(struc
struct pagevec *pvec = &get_cpu_var(lru_add_active_pvecs);

page_cache_get(page);
+ container_init_page_ptr(page, current);
if (!pagevec_add(pvec, page))
__pagevec_lru_add_active(pvec);
put_cpu_var(lru_add_active_pvecs);
--- linux-2.6.18-rc6-mm2.org/mm/vmscan.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/mm/vmscan.c 2006-09-14 15:09:08.000000000 -0700
@@ -818,6 +818,7 @@ force_reclaim_mapped:
SetPageLRU(page);
VM_BUG_ON(!PageActive(page));
ClearPageActive(page);
+ container_dec_activepage_count(page);

list_move(&page->lru, &zone->inactive_list);
pgmoved++;
--- linux-2.6.18-rc6-mm2.org/kernel/exit.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/kernel/exit.c 2006-09-18 18:18:22.000000000 -0700
@@ -41,6 +41,7 @@
#include <linux/audit.h> /* for audit_free() */
#include <linux/resource.h>
#include <linux/blkdev.h>
+#include <linux/container.h>

#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -171,6 +172,7 @@ repeat:

sched_exit(p);
write_unlock_irq(&tasklist_lock);
+ container_remove_task(p, NULL);
proc_flush_task(p);
release_thread(p);
call_rcu(&p->rcu, delayed_put_task_struct);
--- linux-2.6.18-rc6-mm2.org/kernel/fork.c 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/kernel/fork.c 2006-09-19 10:36:20.000000000 -0700
@@ -47,6 +47,7 @@
#include <linux/cn_proc.h>
#include <linux/delayacct.h>
#include <linux/taskstats_kern.h>
+#include <linux/container.h>
#include <linux/random.h>

#include <asm/pgtable.h>
@@ -175,6 +176,13 @@ static struct task_struct *dup_task_stru
}

*tsk = *orig;
+
+ container_init_task_ptr(tsk);
+ if (container_add_task(tsk, orig, NULL) == -ENOSPC) {
+ free_task_struct(tsk);
+ free_thread_info(ti);
+ return NULL;
+ }
tsk->thread_info = ti;
setup_thread_stack(tsk, orig);

@@ -1295,6 +1303,7 @@ bad_fork_cleanup_count:
atomic_dec(&p->user->processes);
free_uid(p->user);
bad_fork_free:
+ container_remove_task(p, NULL);
free_task(p);
fork_out:
return ERR_PTR(retval);
--- linux-2.6.18-rc6-mm2.org/kernel/Makefile 2006-09-14 15:28:33.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/kernel/Makefile 2006-09-14 15:09:08.000000000 -0700
@@ -52,6 +52,7 @@ obj-$(CONFIG_RELAY) += relay.o
obj-$(CONFIG_UTS_NS) += utsname.o
obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
+obj-$(CONFIG_CONTAINERS) += container_configfs.o

ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
--- linux-2.6.18-rc6-mm2.org/fs/inode.c 2006-09-14 15:28:31.000000000 -0700
+++ linux-2.6.18-rc6-mm2.ctn/fs/inode.c 2006-09-14 15:09:08.000000000 -0700
@@ -22,6 +22,7 @@
#include <linux/bootmem.h>
#include <linux/inotify.h>
#include <linux/mount.h>
+#include <linux/container.h>

/*
* This is needed for the following functions:
@@ -164,6 +165,7 @@ static struct inode *alloc_inode(struct
}
inode->i_private = 0;
inode->i_mapping = mapping;
+ container_add_file(mapping, NULL);
}
return inode;
}
@@ -172,6 +174,7 @@ void destroy_inode(struct inode *inode)
{
BUG_ON(inode_has_buffers(inode));
security_inode_free(inode);
+ container_remove_file(inode->i_mapping);
if (inode->i_sb->s_op->destroy_inode)
inode->i_sb->s_op->destroy_inode(inode);
else

-
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