From: Ben Myers <bpm@sgi.com>
To: Jason Rosenberg <jbr@squareup.com>
Cc: stan@hardwarefreak.com, xfs@oss.sgi.com
Subject: Re: understanding speculative preallocation
Date: Fri, 26 Jul 2013 15:50:18 -0500 [thread overview]
Message-ID: <20130726205018.GM3111@sgi.com> (raw)
In-Reply-To: <CAA+BczQGYoJVL0twvz2GRhH30teFPSJOsKWtofbXBrom4_Q6hg@mail.gmail.com>
Hi Jason,
On Fri, Jul 26, 2013 at 04:38:21PM -0400, Jason Rosenberg wrote:
> Thanks for the info (most of it was, in fact, news to me). I'm an
> application developer trying to debug a disk space problem, that's all. So
> far, I've tracked it down to being an XFS issue.
The speculative block reservations have been an issue for awhile. You are not
the first person to take issue with it.
> Regardless, is there a version history for XFS vis-a-via mainline Linux?
You can find a full version history for XFS back to 2.6.12 or so here:
http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xfs/xfs.git;a=summary
If you're interested in going older than that look here:
http://oss.sgi.com/cgi-bin/gitweb.cgi?p=archive/xfs-import.git;a=summary
The function you'll most likely want to track is xfs_iomap_write_delay, which
calls xfs_iomap_eof_want_preallocate, both of which are in fs/xfs/xfs_iomap.c.
Recently Brian Foster added a scanner to remove the speculative block
reservations on a timer which may give you some relief. See
xfs_queue_eofblocks in fs/xfs/xfs_icache.c
Regards,
Ben
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next prev parent reply other threads:[~2013-07-26 20:50 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-26 7:23 understanding speculative preallocation jbr
2013-07-26 11:50 ` Dave Chinner
2013-07-26 17:40 ` Jason Rosenberg
2013-07-26 19:27 ` Stan Hoeppner
2013-07-26 19:43 ` A short digression on FOSS (Re: understanding speculative preallocation) Jay Ashworth
2013-07-27 3:52 ` Stan Hoeppner
2013-07-27 21:00 ` Jay Ashworth
2013-07-28 1:38 ` aurfalien
2013-07-28 1:50 ` Jay Ashworth
2013-07-28 2:08 ` aurfalien
2013-07-28 2:21 ` Jay Ashworth
2013-07-28 5:09 ` Purpose of the XFS list -- was: " Stan Hoeppner
2013-07-28 15:45 ` Jay Ashworth
2013-08-14 17:01 ` Emmanuel Florac
2013-07-28 7:18 ` Stefan Ring
2013-07-28 15:48 ` Jay Ashworth
2013-07-29 0:02 ` Dave Chinner
2013-07-29 0:06 ` Jay Ashworth
2013-07-29 2:41 ` Dave Chinner
2013-07-29 3:12 ` Eric Sandeen
2013-07-29 4:11 ` Stan Hoeppner
2013-07-29 14:33 ` Jay Ashworth
2013-07-29 15:25 ` Dave Howorth
2013-07-29 3:38 ` Keith Keller
2013-07-29 4:32 ` Eric Sandeen
2013-07-29 4:57 ` Keith Keller
2013-07-29 13:38 ` Eric Sandeen
2013-07-29 18:15 ` Keith Keller
2013-07-29 14:24 ` Jay Ashworth
2013-07-29 14:36 ` Jay Ashworth
2013-07-29 14:57 ` Eric Sandeen
2013-07-29 15:30 ` Jay Ashworth
2013-07-29 17:05 ` Eric Sandeen
2013-07-29 0:00 ` Dave Chinner
2013-07-28 5:15 ` Michael L. Semon
2013-07-26 20:38 ` understanding speculative preallocation Jason Rosenberg
2013-07-26 20:50 ` Ben Myers [this message]
2013-07-26 21:04 ` Jason Rosenberg
2013-07-26 21:11 ` Jason Rosenberg
2013-07-26 21:42 ` Ben Myers
2013-07-27 1:30 ` Dave Chinner
2013-07-28 2:19 ` Jason Rosenberg
2013-07-29 0:04 ` Dave Chinner
2013-07-26 21:45 ` Eric Sandeen
2013-07-27 4:26 ` Keith Keller
2013-07-27 1:26 ` Dave Chinner
-- strict thread matches above, loose matches on Subject: below --
2013-07-26 7:35 jbr
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