Home » Mailing lists » Devel » [patch02/05]: Containers(V2)- Generic Linux kernel changes
| [patch02/05]: Containers(V2)- Generic Linux kernel changes [message #6525] |
Wed, 20 September 2006 02:18  |
Rohit Seth
Messages: 101
Registered: August 2006
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Senior Member |
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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_struc
...
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| Re: [ckrm-tech] [patch02/05]: Containers(V2)- Generic Linux kernel changes [message #6721 is a reply to message #6664] |
Thu, 21 September 2006 22:29  |
Rohit Seth
Messages: 101
Registered: August 2006
|
Senior Member |
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On Wed, 2006-09-20 at 18:33 -0700, Chandra Seetharaman wrote:
> On Wed, 2006-09-20 at 17:23 -0700, Christoph Lameter wrote:
> > On Wed, 20 Sep 2006, Andi Kleen wrote:
> >
> > > There are lots of different cases. At least for anonymous memory
> > > ->mapping should be free. Perhaps that could be used for anonymous
> > > memory and a separate data structure for the important others.
> >
> > mapping is used for swap and to point to the anon vma.
> >
> > > slab should have at least one field free too, although it might be a different
> > > one (iirc Christoph's rewrite uses more than the current slab, but it would
> > > surprise me if he needed all)
> >
> > slab currently has lots of fields free but my rewrite uses all of them.
> > And AFAICT this patchset does not track slab pages.
> >
> > Hmm.... Build a radix tree with pointers to the pages?
>
> Yes, that would be a way to isolate the overhead.
>
As said earlier, the additional cost is not really that much. And if we
do get additional benefit of proper cache alignment for page struct
because of this additional pointer then it could be a almost zero cost.
And in mm kernel, I also see PAGE_OWNER defined which puts the whole
page struct out of sync with caches.
Christoph, Please let me know if there is still a placeholder for
container pointer ONLY for kernel pages. I think it is easy to do away
with per page pointer for user land as it can be stored in anon_vma or
mappings.
-rohit
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