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Date: Tue, 9 Sep 2014 21:05:41 +0800
From: Ming Lei <ming.lei@...onical.com>
To: Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org
Cc: linux-scsi@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: [PATCH 0/8] block: per-distpatch_queue flush machinery
Hi,
As recent discussion, especially suggested by Christoph, this patchset
implements per-distpatch_queue flush machinery, so that:
- current init_request and exit_request callbacks can
cover flush request too, then the ugly and buggy copying
way of initializing flush request's pdu can be fixed
- flushing performance gets improved in case of multi hw-queue
About 70% throughput improvement is observed in sync write/randwrite
over multi dispatch-queue virtio-blk, see details in commit log
of patch 8/8.
This patchset can be pulled from below tree too:
git://kernel.ubuntu.com/ming/linux.git v3.17-block-dev
block/blk-core.c | 11 +--
block/blk-flush.c | 239 +++++++++++++++++++++++++++++++++++++++---------
block/blk-mq.c | 27 +++---
block/blk-mq.h | 1 -
block/blk-sysfs.c | 4 +-
block/blk.h | 35 ++++++-
include/linux/blk-mq.h | 2 +
include/linux/blkdev.h | 10 +-
8 files changed, 251 insertions(+), 78 deletions(-)
Thanks,
--
Ming Lei
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