| 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 |
| Message-ID: |
| <1295625598-15203-1-git-send-email-tj@kernel.org> |
| Archive‑link: | |
Article |
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
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