From: Shaohua Li <shli@fb.com>
To: linux-raid@vger.kernel.org
Cc: Kernel-team@fb.com, songliubraving@fb.com, hch@infradead.org,
dan.j.williams@intel.com, neilb@suse.de
Subject: [PATCH v3 0/8] MD: a caching layer for raid5/6
Date: Wed, 3 Jun 2015 15:48:35 -0700 [thread overview]
Message-ID: <cover.1433356864.git.shli@fb.com> (raw)
Hi,
This is the third version of the raid5/6 caching layer patches. The patches add
a caching layer for raid5/6. The caching layer uses a SSD as a cache for a raid
5/6. It works like the similar way of a hardware raid controller. The purpose
is to improve raid performance (reduce read-modify-write) and fix write hole
issue. The main patch is patch 3 and the description has all details about the
implementation. Please review!
Thanks,
Shaohua
V3:
-make reclaim multi-thread
-add statistics in sysfs
-bug fixes
V2:
-metadata write doesn't use FUA
-discard request is only issued when necessary
-bug fixes and cleanup
Shaohua Li (7):
raid5: directly use mddev->queue
raid5: A caching layer for RAID5/6
raid5: add some sysfs entries
md: don't allow resize/reshape with cache support
raid5: skip resync if caching is enabled
raid5: guarantee cache release stripes in correct way
raid5: multi-thread support for raid5 caching reclaim
Song Liu (1):
MD: add a new disk role to present cache device
drivers/md/Makefile | 2 +-
drivers/md/md.c | 14 +-
drivers/md/md.h | 4 +
drivers/md/raid5-cache.c | 3775 ++++++++++++++++++++++++++++++++++++++++
drivers/md/raid5.c | 177 +-
drivers/md/raid5.h | 25 +-
include/uapi/linux/raid/md_p.h | 73 +
7 files changed, 4022 insertions(+), 48 deletions(-)
create mode 100644 drivers/md/raid5-cache.c
--
1.8.1
next reply other threads:[~2015-06-03 22:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-03 22:48 Shaohua Li [this message]
2015-06-03 22:48 ` [PATCH v3 1/8] MD: add a new disk role to present cache device Shaohua Li
2015-06-17 23:32 ` Neil Brown
2015-06-03 22:48 ` [PATCH v3 2/8] raid5: directly use mddev->queue Shaohua Li
2015-06-03 22:48 ` [PATCH v3 4/8] raid5: add some sysfs entries Shaohua Li
2015-06-03 22:48 ` [PATCH v3 5/8] md: don't allow resize/reshape with cache support Shaohua Li
2015-06-18 1:16 ` Neil Brown
2015-06-03 22:48 ` [PATCH v3 6/8] raid5: skip resync if caching is enabled Shaohua Li
2015-06-03 22:48 ` [PATCH v3 7/8] raid5: guarantee cache release stripes in correct way Shaohua Li
2015-06-03 22:48 ` [PATCH v3 8/8] raid5: multi-thread support for raid5 caching reclaim Shaohua Li
2015-06-04 19:29 ` Fwd: [PATCH v3 0/8] MD: a caching layer for raid5/6 Davor Vusir
[not found] ` <c6df8779f11a4dc3362a04e7cee0be2aec213ebe.1433356864.git.shli@fb.com>
2015-06-18 1:00 ` [PATCH v3 3/8] raid5: A caching layer for RAID5/6 Neil Brown
2015-06-18 5:24 ` Shaohua Li
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