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Date: Sun, 17 Jun 2012 14:56:15 +0800
From: Sha Zhengju <handai.szj@...il.com>
To: Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: linux-mm@...ck.org, cgroups@...r.kernel.org, gthelen@...gle.com,
yinghan@...gle.com, akpm@...ux-foundation.org,
linux-kernel@...r.kernel.org, Sha Zhengju <handai.szj@...bao.com>
Subject: Re: [PATCH 1/2] memcg: remove MEMCG_NR_FILE_MAPPED
On Sat, Jun 16, 2012 at 2:31 PM, Kamezawa Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
> (2012/06/15 21:00), Sha Zhengju wrote:
>> While doing memcg page stat accounting, there's no need to use MEMCG_NR_FILE_MAPPED
>> as an intermediate, we can use MEM_CGROUP_STAT_FILE_MAPPED directly.
>>
>> Signed-off-by: Sha Zhengju<handai.szj@...bao.com>
>
> I'm sorry but my recent patch modified mem_cgroup_stat_index and this will hunk with
> mm tree. (not visible in linux-next yet.)
>
> I have no objection to the patch. I'm grad if you'll update this and repost, later.
>
Okay, I'll repost one based on mm tree.
Thanks,
Sha
> Thanks,
> -Kame
>
>
>> ---
>> include/linux/memcontrol.h | 22 ++++++++++++++++------
>> mm/memcontrol.c | 25 +------------------------
>> mm/rmap.c | 4 ++--
>> 3 files changed, 19 insertions(+), 32 deletions(-)
>>
>> diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
>> index f94efd2..a337c2e 100644
>> --- a/include/linux/memcontrol.h
>> +++ b/include/linux/memcontrol.h
>> @@ -27,9 +27,19 @@ struct page_cgroup;
>> struct page;
>> struct mm_struct;
>>
>> -/* Stats that can be updated by kernel. */
>> -enum mem_cgroup_page_stat_item {
>> - MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
>> +/*
>> + * Statistics for memory cgroup.
>> + */
>> +enum mem_cgroup_stat_index {
>> + /*
>> + * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss.
>> + */
>> + MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
>> + MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */
>> + MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */
>> + MEM_CGROUP_STAT_SWAPOUT, /* # of pages, swapped out */
>> + MEM_CGROUP_STAT_DATA, /* end of data requires synchronization */
>> + MEM_CGROUP_STAT_NSTATS,
>> };
>>
>> struct mem_cgroup_reclaim_cookie {
>> @@ -170,17 +180,17 @@ static inline void mem_cgroup_end_update_page_stat(struct page *page,
>> }
>>
>> void mem_cgroup_update_page_stat(struct page *page,
>> - enum mem_cgroup_page_stat_item idx,
>> + enum mem_cgroup_stat_index idx,
>> int val);
>>
>> static inline void mem_cgroup_inc_page_stat(struct page *page,
>> - enum mem_cgroup_page_stat_item idx)
>> + enum mem_cgroup_stat_index idx)
>> {
>> mem_cgroup_update_page_stat(page, idx, 1);
>> }
>>
>> static inline void mem_cgroup_dec_page_stat(struct page *page,
>> - enum mem_cgroup_page_stat_item idx)
>> + enum mem_cgroup_stat_index idx)
>> {
>> mem_cgroup_update_page_stat(page, idx, -1);
>> }
>> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
>> index 7685d4a..9102b8c 100644
>> --- a/mm/memcontrol.c
>> +++ b/mm/memcontrol.c
>> @@ -77,21 +77,6 @@ static int really_do_swap_account __initdata = 0;
>> #endif
>>
>>
>> -/*
>> - * Statistics for memory cgroup.
>> - */
>> -enum mem_cgroup_stat_index {
>> - /*
>> - * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss.
>> - */
>> - MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
>> - MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */
>> - MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */
>> - MEM_CGROUP_STAT_SWAPOUT, /* # of pages, swapped out */
>> - MEM_CGROUP_STAT_DATA, /* end of data requires synchronization */
>> - MEM_CGROUP_STAT_NSTATS,
>> -};
>> -
>> enum mem_cgroup_events_index {
>> MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */
>> MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */
>> @@ -1958,7 +1943,7 @@ void __mem_cgroup_end_update_page_stat(struct page *page, unsigned long *flags)
>> }
>>
>> void mem_cgroup_update_page_stat(struct page *page,
>> - enum mem_cgroup_page_stat_item idx, int val)
>> + enum mem_cgroup_stat_index idx, int val)
>> {
>> struct mem_cgroup *memcg;
>> struct page_cgroup *pc = lookup_page_cgroup(page);
>> @@ -1971,14 +1956,6 @@ void mem_cgroup_update_page_stat(struct page *page,
>> if (unlikely(!memcg || !PageCgroupUsed(pc)))
>> return;
>>
>> - switch (idx) {
>> - case MEMCG_NR_FILE_MAPPED:
>> - idx = MEM_CGROUP_STAT_FILE_MAPPED;
>> - break;
>> - default:
>> - BUG();
>> - }
>> -
>> this_cpu_add(memcg->stat->count[idx], val);
>> }
>>
>> diff --git a/mm/rmap.c b/mm/rmap.c
>> index 5b5ad58..7e4e481 100644
>> --- a/mm/rmap.c
>> +++ b/mm/rmap.c
>> @@ -1154,7 +1154,7 @@ void page_add_file_rmap(struct page *page)
>> mem_cgroup_begin_update_page_stat(page,&locked,&flags);
>> if (atomic_inc_and_test(&page->_mapcount)) {
>> __inc_zone_page_state(page, NR_FILE_MAPPED);
>> - mem_cgroup_inc_page_stat(page, MEMCG_NR_FILE_MAPPED);
>> + mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
>> }
>> mem_cgroup_end_update_page_stat(page,&locked,&flags);
>> }
>> @@ -1208,7 +1208,7 @@ void page_remove_rmap(struct page *page)
>> NR_ANON_TRANSPARENT_HUGEPAGES);
>> } else {
>> __dec_zone_page_state(page, NR_FILE_MAPPED);
>> - mem_cgroup_dec_page_stat(page, MEMCG_NR_FILE_MAPPED);
>> + mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
>> }
>> /*
>> * It would be tidy to reset the PageAnon mapping here,
>
>
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