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

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Message-ID: <20100302134736.GG3212@balbir.in.ibm.com>
Date:	Tue, 2 Mar 2010 19:17:36 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Andrea Righi <arighi@...eler.com>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Greg Thelen <gthelen@...gle.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	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

* 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?

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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