From: Theodore Ts'o <tytso@mit.edu>
To: Gioh Kim <gioh.kim@lge.com>
Cc: akpm@linux-foundation.org, jack@suse.cz,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk,
paulmck@linux.vnet.ibm.com, peterz@infradead.org,
adilger.kernel@dilger.ca, minchan@kernel.org, js1304@gmail.com,
gunho.lee@lge.com
Subject: Re: [PATCHv4 3/3] jbd/jbd2: use non-movable memory for the jbd superblock
Date: Thu, 4 Sep 2014 22:37:45 -0400 [thread overview]
Message-ID: <20140905023745.GC1971@thunk.org> (raw)
In-Reply-To: <1409815781-28011-4-git-send-email-gioh.kim@lge.com>
On Thu, Sep 04, 2014 at 04:29:41PM +0900, Gioh Kim wrote:
> A long-lasting buffer-cache can distrub page migration so that
> it must be allocated from non-movable area.
>
> The journal_init_inode is creating a buffer-cache for superblock journaling.
> The superblock exists until system shutdown so that the buffer-cache
> for the superblock would also exist for a long time
> and it can distrub page migration.
>
> This patch make the buffer-cache be allocated from non-movable area
> not to distrub page migration.
>
> Signed-off-by: Gioh Kim <gioh.kim@lge.com>
> Reviewed-by: Jan Kara <jack@suse.cz>
Thanks, I've applied this to the ext4 git tree with a slightly
rewritten commit description (for clarity).
- Ted
prev parent reply other threads:[~2014-09-05 2:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1409815781-28011-1-git-send-email-gioh.kim@lge.com>
2014-09-04 22:16 ` [PATCHv4 0/3] new APIs to allocate buffer-cache with user specific flag Andrew Morton
2014-09-05 0:37 ` Gioh Kim
2014-09-05 1:14 ` Theodore Ts'o
2014-09-05 1:48 ` Joonsoo Kim
2014-09-05 3:17 ` Theodore Ts'o
2014-09-05 7:32 ` Joonsoo Kim
2014-09-05 14:14 ` Theodore Ts'o
2014-09-15 1:10 ` Joonsoo Kim
2014-09-15 6:37 ` Minchan Kim
[not found] ` <1409815781-28011-2-git-send-email-gioh.kim@lge.com>
2014-09-05 2:37 ` [PATCHv4 1/3] fs.c: support buffer cache allocations with gfp modifiers Theodore Ts'o
[not found] ` <1409815781-28011-3-git-send-email-gioh.kim@lge.com>
2014-09-05 2:37 ` [PATCHv4 2/3] ext4: use non-movable memory for the ext4 superblock Theodore Ts'o
[not found] ` <1409815781-28011-4-git-send-email-gioh.kim@lge.com>
2014-09-05 2:37 ` Theodore Ts'o [this message]
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