From: Ted Ts'o <tytso@mit.edu>
To: "Jörn Engel" <joern@logfs.org>
Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org
Subject: Re: Filesystem benchmarks on reasonably fast hardware
Date: Tue, 26 Jul 2011 10:57:36 -0400 [thread overview]
Message-ID: <20110726145736.GA7684@thunk.org> (raw)
In-Reply-To: <20110725182037.GE26160@logfs.org>
On Mon, Jul 25, 2011 at 08:20:37PM +0200, Jörn Engel wrote:
> On Mon, 25 July 2011 11:18:25 -0400, Ted Ts'o wrote:
> >
> > Did you have a chance to do an ext4 lockstat run?
Hi Jörn,
Thanks for forwarding it to me. It's the same problem as in XFS, the
excessive coverage of the i_mutex lock. In ext4's case, it's in the
generic generic_file_aio_write() machinery where we need to do the
lock busting. (XFS apparently doesn't use the generic routines, so
the fix that Dave did won't help ext3 and ext4.)
I don't have the time to look at it now, but I'll put it on my todo
list; or maybe someone with a bit more time can look into how we might
be able to use a similar approach in the generic file system code.
- Ted
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next prev parent reply other threads:[~2011-07-26 14:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-17 16:05 Filesystem benchmarks on reasonably fast hardware Jörn Engel
2011-07-17 23:32 ` Dave Chinner
[not found] ` <20110718075339.GB1437@logfs.org>
2011-07-18 10:57 ` Dave Chinner
2011-07-18 11:40 ` Jörn Engel
2011-07-19 2:41 ` Dave Chinner
2011-07-19 7:36 ` Jörn Engel
2011-07-19 9:23 ` srimugunthan dhandapani
2011-07-21 19:05 ` Jörn Engel
2011-07-19 10:15 ` Dave Chinner
2011-07-18 14:34 ` Jörn Engel
[not found] ` <20110718103956.GE1437@logfs.org>
2011-07-18 11:10 ` Dave Chinner
2011-07-18 12:07 ` Ted Ts'o
2011-07-18 12:42 ` Jörn Engel
2011-07-25 15:18 ` Ted Ts'o
2011-07-25 18:20 ` Jörn Engel
2011-07-25 21:18 ` Ted Ts'o
2011-07-26 14:57 ` Ted Ts'o [this message]
2011-07-27 3:39 ` Yongqiang Yang
2011-07-19 13:19 ` Dave Chinner
2011-07-21 10:42 ` Jörn Engel
2011-07-22 18:51 ` Jörn Engel
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