[PATCHSET] block: reimplement FLUSH/FUA to support merge

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From: Tejun Heo <tj@kernel.org>
To: axboe@kernel.dk, tytso@mit.edu, djwong@us.ibm.com,
	shli@kernel.org, neilb@suse.de, adilger.kernel@dilger.ca,
	jack@suse.cz, snitzer@redhat.com, linux-kernel@vger.kernel.org,
	kmannth@us
Subject: [PATCHSET] block: reimplement FLUSH/FUA to support merge
Date: Fri, 21 Jan 2011 16:59:55 +0100	[thread overview]
Message-ID: <1295625598-15203-1-git-send-email-tj@kernel.org> (raw)

Hello,

This patchset reimplements (yeah, once more) so that FLUSH/FUA
requests can be merged.  This is inspired by Darrick's patches to
merge multiple zero-data flushes which helps workloads with highly
concurrent fsync requests.

For more information, please read the patch description on the third
patch.

 0001-block-add-REQ_FLUSH_SEQ.patch
 0002-block-improve-flush-bio-completion.patch
 0003-block-reimplement-FLUSH-FUA-to-support-merge.patch

0001-0002 prepare for the reimplementation.  0003 reimplements.

Tested on FLUSH+FUA, FLUSH, and no FLUSH configurations.  Works pretty
solid for me.  Darrick says that preliminary performance test looks
okay.  Darrick, please use this version for further testing as I fixed
a few problems.

This patchset is based on 2.6.38-rc1 (2b1caf6e) and available in the
following git branch,

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git block-flush-merge

and contains the following changes.

 block/blk-core.c          |   56 ++---
 block/blk-flush.c         |  441 +++++++++++++++++++++++++++++++---------------
 block/blk.h               |   12 -
 block/elevator.c          |    7 
 include/linux/blk_types.h |    2 
 include/linux/blkdev.h    |   18 +
 include/linux/elevator.h  |    1 
 7 files changed, 355 insertions(+), 182 deletions(-)

Thanks.

--
tejun

WARNING: multiple messages have this Message-ID (diff)

From: Tejun Heo <tj@kernel.org>
To: axboe@kernel.dk, tytso@mit.edu, djwong@us.ibm.com,
	shli@kernel.org, neilb@suse.de, adilger.kernel@dilger.ca,
	jack@suse.cz, snitzer@redhat.com, linux-kernel@vger.kernel.org,
	kmannth@us.ibm.com, cmm@us.ibm.com, linux-ext4@vger.kernel.org,
	rwheeler@redhat.com, hch@lst.de, josef@redhat.com
Subject: [PATCHSET] block: reimplement FLUSH/FUA to support merge
Date: Fri, 21 Jan 2011 16:59:55 +0100	[thread overview]
Message-ID: <1295625598-15203-1-git-send-email-tj@kernel.org> (raw)

Hello,

This patchset reimplements (yeah, once more) so that FLUSH/FUA
requests can be merged.  This is inspired by Darrick's patches to
merge multiple zero-data flushes which helps workloads with highly
concurrent fsync requests.

For more information, please read the patch description on the third
patch.

 0001-block-add-REQ_FLUSH_SEQ.patch
 0002-block-improve-flush-bio-completion.patch
 0003-block-reimplement-FLUSH-FUA-to-support-merge.patch

0001-0002 prepare for the reimplementation.  0003 reimplements.

Tested on FLUSH+FUA, FLUSH, and no FLUSH configurations.  Works pretty
solid for me.  Darrick says that preliminary performance test looks
okay.  Darrick, please use this version for further testing as I fixed
a few problems.

This patchset is based on 2.6.38-rc1 (2b1caf6e) and available in the
following git branch,

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git block-flush-merge

and contains the following changes.

 block/blk-core.c          |   56 ++---
 block/blk-flush.c         |  441 +++++++++++++++++++++++++++++++---------------
 block/blk.h               |   12 -
 block/elevator.c          |    7 
 include/linux/blk_types.h |    2 
 include/linux/blkdev.h    |   18 +
 include/linux/elevator.h  |    1 
 7 files changed, 355 insertions(+), 182 deletions(-)

Thanks.

--
tejun

next             reply	other threads:[~2011-01-21 16:00 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-21 15:59 Tejun Heo [this message]
2011-01-21 15:59 ` [PATCHSET] block: reimplement FLUSH/FUA to support merge Tejun Heo
2011-01-21 15:59 ` [PATCH 1/3] block: add REQ_FLUSH_SEQ Tejun Heo
2011-01-21 15:59   ` Tejun Heo
2011-01-21 15:59 ` [PATCH 2/3] block: improve flush bio completion Tejun Heo
2011-01-21 15:59   ` Tejun Heo
2011-01-21 15:59 ` [PATCH 3/3] block: reimplement FLUSH/FUA to support merge Tejun Heo
2011-01-21 15:59 ` Tejun Heo
2011-01-21 18:56   ` Vivek Goyal
2011-01-21 19:19     ` Vivek Goyal
2011-01-23 10:25     ` Tejun Heo
2011-01-23 10:29       ` Tejun Heo
2011-01-24 20:31       ` Darrick J. Wong
2011-01-25 10:21         ` Tejun Heo
2011-01-25 11:39           ` Jens Axboe
2011-03-23 23:37             ` Darrick J. Wong
2011-01-25 22:56           ` Darrick J. Wong
2011-01-22  0:49   ` Mike Snitzer
2011-01-23 10:31     ` Tejun Heo
2011-01-25 20:46       ` Vivek Goyal
2011-01-25 21:04         ` Mike Snitzer
2011-01-23 10:48   ` [PATCH UPDATED " Tejun Heo
2011-01-23 10:48     ` Tejun Heo
2011-01-25 20:41   ` [KNOWN BUGGY RFC PATCH 4/3] block: skip elevator initialization for flush requests Mike Snitzer
2011-01-25 20:41     ` Mike Snitzer
2011-01-25 21:55     ` Mike Snitzer
2011-01-26  5:27       ` [RFC PATCH 4/3] block: skip elevator initialization for flush requests -- was never BUGGY relative to upstream Mike Snitzer
2011-01-26 10:03     ` [KNOWN BUGGY RFC PATCH 4/3] block: skip elevator initialization for flush requests Tejun Heo
2011-01-26 10:05       ` Tejun Heo
2011-02-01 17:38       ` [RFC " Mike Snitzer
2011-02-01 18:52         ` Tejun Heo
2011-02-01 22:46           ` [PATCH v2 1/2] " Mike Snitzer
2011-02-02 21:51             ` Vivek Goyal
2011-02-02 22:06               ` Mike Snitzer
2011-02-02 22:55             ` [PATCH v3 1/2] block: skip elevator data " Mike Snitzer
2011-02-03  9:28               ` Tejun Heo
2011-02-03 14:48                 ` [PATCH v4 " Mike Snitzer
2011-02-03 13:24               ` [PATCH v3 " Jens Axboe
2011-02-03 13:38                 ` Tejun Heo
2011-02-04 15:04                   ` Vivek Goyal
2011-02-04 15:08                     ` Tejun Heo
2011-02-04 16:58                     ` [PATCH v5 " Mike Snitzer
2011-02-03 14:54                 ` [PATCH v3 " Mike Snitzer
2011-02-01 22:46           ` [PATCH v2 2/2] block: share request flush fields with elevator_private Mike Snitzer
2011-02-01 22:46             ` Mike Snitzer
2011-02-02 21:52             ` Vivek Goyal
2011-02-03  9:24             ` Tejun Heo
2011-02-11 10:08             ` Jens Axboe

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