linux-kernel - Re: [PATCH 50/51] mpage: make __mpage_writepage() honor cgroup writeback

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150701192640.GL7252@quack.suse.cz>
Date:	Wed, 1 Jul 2015 21:26:40 +0200
From:	Jan Kara <jack@...e.cz>
To:	Tejun Heo <tj@...nel.org>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org, jack@...e.cz,
	hch@...radead.org, hannes@...xchg.org,
	linux-fsdevel@...r.kernel.org, vgoyal@...hat.com,
	lizefan@...wei.com, cgroups@...r.kernel.org, linux-mm@...ck.org,
	mhocko@...e.cz, clm@...com, fengguang.wu@...el.com,
	david@...morbit.com, gthelen@...gle.com, khlebnikov@...dex-team.ru,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 50/51] mpage: make __mpage_writepage() honor cgroup
 writeback

On Fri 22-05-15 17:14:04, Tejun Heo wrote:
> __mpage_writepage() is used to implement mpage_writepages() which in
> turn is used for ->writepages() of various filesystems.  All writeback
> logic is now updated to handle cgroup writeback and the block cgroup
> to issue IOs for is encoded in writeback_control and can be retrieved
> from the inode; however, __mpage_writepage() currently ignores the
> blkcg indicated by the inode and issues all bio's without explicit
> blkcg association.
> 
> This patch updates __mpage_writepage() so that the issued bio's are
> associated with inode_to_writeback_blkcg_css(inode).
> 
> v2: Updated for per-inode wb association.

Looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.com>

								Honza
 
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Jens Axboe <axboe@...nel.dk>
> Cc: Jan Kara <jack@...e.cz>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Alexander Viro <viro@...iv.linux.org.uk>
> ---
>  fs/mpage.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/mpage.c b/fs/mpage.c
> index 3e79220..a3ccb0b 100644
> --- a/fs/mpage.c
> +++ b/fs/mpage.c
> @@ -605,6 +605,8 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
>  				bio_get_nr_vecs(bdev), GFP_NOFS|__GFP_HIGH);
>  		if (bio == NULL)
>  			goto confused;
> +
> +		bio_associate_blkcg(bio, inode_to_wb_blkcg_css(inode));
>  	}
>  
>  	/*
> -- 
> 2.4.0
> 
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/