linux-kernel - Re: [PATCH -mmotm 3/3] memcg: dirty pages instrumentation

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Message-ID: <cc557aab1003020556kcb3f790yba5bceaeb75c5a4c@mail.gmail.com>
Date:	Tue, 2 Mar 2010 15:56:44 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	balbir@...ux.vnet.ibm.com
Cc:	Andrea Righi <arighi@...eler.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Greg Thelen <gthelen@...gle.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Andrew Morton <akpm@...ux-foundation.org>,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH -mmotm 3/3] memcg: dirty pages instrumentation

On Tue, Mar 2, 2010 at 3:47 PM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> * Andrea Righi <arighi@...eler.com> [2010-03-01 22:23:40]:
>
>> Apply the cgroup dirty pages accounting and limiting infrastructure to
>> the opportune kernel functions.
>>
>> Signed-off-by: Andrea Righi <arighi@...eler.com>
>> ---
>>  fs/fuse/file.c      |    5 +++
>>  fs/nfs/write.c      |    4 ++
>>  fs/nilfs2/segment.c |   10 +++++-
>>  mm/filemap.c        |    1 +
>>  mm/page-writeback.c |   84 ++++++++++++++++++++++++++++++++------------------
>>  mm/rmap.c           |    4 +-
>>  mm/truncate.c       |    2 +
>>  7 files changed, 76 insertions(+), 34 deletions(-)
>>
>> diff --git a/fs/fuse/file.c b/fs/fuse/file.c
>> index a9f5e13..dbbdd53 100644
>> --- a/fs/fuse/file.c
>> +++ b/fs/fuse/file.c
>> @@ -11,6 +11,7 @@
>>  #include <linux/pagemap.h>
>>  #include <linux/slab.h>
>>  #include <linux/kernel.h>
>> +#include <linux/memcontrol.h>
>>  #include <linux/sched.h>
>>  #include <linux/module.h>
>>
>> @@ -1129,6 +1130,8 @@ static void fuse_writepage_finish(struct fuse_conn *fc, struct fuse_req *req)
>>
>>       list_del(&req->writepages_entry);
>>       dec_bdi_stat(bdi, BDI_WRITEBACK);
>> +     mem_cgroup_update_stat(req->pages[0],
>> +                     MEM_CGROUP_STAT_WRITEBACK_TEMP, -1);
>>       dec_zone_page_state(req->pages[0], NR_WRITEBACK_TEMP);
>>       bdi_writeout_inc(bdi);
>>       wake_up(&fi->page_waitq);
>> @@ -1240,6 +1243,8 @@ static int fuse_writepage_locked(struct page *page)
>>       req->inode = inode;
>>
>>       inc_bdi_stat(mapping->backing_dev_info, BDI_WRITEBACK);
>> +     mem_cgroup_update_stat(tmp_page,
>> +                     MEM_CGROUP_STAT_WRITEBACK_TEMP, 1);
>>       inc_zone_page_state(tmp_page, NR_WRITEBACK_TEMP);
>>       end_page_writeback(page);
>>
>> diff --git a/fs/nfs/write.c b/fs/nfs/write.c
>> index b753242..7316f7a 100644
>> --- a/fs/nfs/write.c
>> +++ b/fs/nfs/write.c
>
> Don't need memcontrol.h to be included here?

It's included in <linux/swap.h>

> Looks OK to me overall, but there might be objection using the
> mem_cgroup_* naming convention, but I don't mind it very much :)
>
> --
>        Three Cheers,
>        Balbir
>
> --
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