From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-ext4 <linux-ext4@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: semi-stable page writes
Date: Fri, 26 Oct 2012 03:19:09 -0700 [thread overview]
Message-ID: <20121026101909.GB19617@blackbox.djwong.org> (raw)
Hi everyone,
Are people still annoyed about writes taking unexpectedly long amounts of tme
due to the stable page write patchset? I'm guessing yes...
I'm close to posting a patchset that (a) gates the wait_on_page_writeback calls
on a flag that you can set in the bdi to indicate that you need stable writes
(which blk_integrity_register will set); (b) (ab)uses a page flag bit (PG_slab)
to indicate that a page is actually being sent out to disk hardware; and (c)
changes the three calls to wait_on_page_writeback()s that were in the original
patchset to only wait if the bit in (b) is set. Sort of a hack, but it'll fix
some of the latency complaints.
I guess I should let that run overnight, and clean up/mail out the set tomorrow.
--D
next reply other threads:[~2012-10-26 10:19 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-26 10:19 Darrick J. Wong [this message]
2012-10-27 1:35 ` [RFC PATCH 1/2] bdi: Create a flag to indicate that a backing device needs stable page writes Darrick J. Wong
2012-10-29 18:13 ` Jan Kara
2012-10-29 18:30 ` Jan Kara
2012-10-29 23:48 ` NeilBrown
2012-10-30 0:10 ` Jan Kara
2012-10-30 0:34 ` NeilBrown
2012-10-30 13:38 ` Jan Kara
2012-10-30 21:49 ` NeilBrown
2012-10-30 4:10 ` Martin K. Petersen
2012-10-30 4:48 ` NeilBrown
2012-10-30 12:19 ` Martin K. Petersen
2012-10-30 20:14 ` Darrick J. Wong
2012-10-30 22:14 ` NeilBrown
2012-10-30 23:58 ` Boaz Harrosh
2012-10-31 8:56 ` Darrick J. Wong
2012-10-31 11:56 ` Jan Kara
2012-10-31 19:36 ` Darrick J. Wong
2012-10-31 23:12 ` Boaz Harrosh
2012-11-01 5:51 ` Darrick J. Wong
2012-11-01 6:25 ` Boaz Harrosh
2012-11-01 8:59 ` Jan Kara
2012-11-01 17:24 ` Boaz Harrosh
2012-11-01 22:42 ` Jan Kara
2012-10-30 22:40 ` Boaz Harrosh
2012-10-27 1:36 ` [RFC PATCH 2/2] mm: Gate stable page writes on the bdi flag Darrick J. Wong
2012-10-29 18:28 ` Jan Kara
2012-10-31 8:58 ` Darrick J. Wong
2012-10-29 22:01 ` semi-stable page writes Dave Chinner
2012-10-30 1:00 ` Theodore Ts'o
2012-10-30 23:30 ` Dave Chinner
2012-10-31 11:45 ` Jan Kara
2012-10-30 20:40 ` Darrick J. Wong
2012-10-30 23:43 ` Dave Chinner
2012-10-31 9:05 ` Darrick J. Wong
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