From: Theodore Ts'o <tytso@mit.edu>
To: Jan Kara <jack@suse.cz>
Cc: Eric Sandeen <sandeen@redhat.com>,
ext4 development <linux-ext4@vger.kernel.org>
Subject: Re: [PATCH RFC] jbd: don't wake kjournald unnecessarily
Date: Wed, 19 Dec 2012 15:27:34 -0500 [thread overview]
Message-ID: <20121219202734.GA18804@thunk.org> (raw)
In-Reply-To: <20121219171401.GB28042@quack.suse.cz>
On Wed, Dec 19, 2012 at 06:14:01PM +0100, Jan Kara wrote:
> I agree. Just I'm still somewhat puzzled by those two reports pointed to
> by Eric. In both cases stored tids were 0 and I cannot see how that happens
> (well how it could happen in a reasonably likely way).
I'm also really puzzled about how Eric's patch makes a 10% different
on the AIM7 benchmark; as you've pointed out, that will just cause an
extra wakeup of the jbd/jbd2 thread, which should then quickly check
and decide to go back to sleep.
- Ted
next prev parent reply other threads:[~2012-12-19 20:27 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-18 17:03 [PATCH RFC] jbd: don't wake kjournald unnecessarily Eric Sandeen
2012-12-19 1:27 ` Jan Kara
2012-12-19 2:05 ` Jan Kara
2012-12-19 3:08 ` Eric Sandeen
2012-12-19 8:13 ` Jan Kara
2012-12-19 15:37 ` Theodore Ts'o
2012-12-19 17:14 ` Jan Kara
2012-12-19 20:27 ` Theodore Ts'o [this message]
2012-12-19 21:19 ` Eric Sandeen
2012-12-21 17:01 ` Eric Sandeen
2012-12-21 17:46 ` Theodore Ts'o
2013-01-08 19:19 ` Eric Sandeen
2013-01-11 16:42 ` Eric Sandeen
2013-01-11 19:03 ` Jan Kara
2013-01-11 19:06 ` Eric Sandeen
2012-12-19 15:46 ` Eric Sandeen
2012-12-19 17:11 ` Jan Kara
2012-12-19 2:36 ` Eric Sandeen
2012-12-19 2:59 ` [PATCH] jbd2: " Eric Sandeen
2012-12-19 8:09 ` Jan Kara
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