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 v2 0/6] a caching layer for raid5/6
Date: Mon, 18 May 2015 19:57:28 -0700 [thread overview]
Message-ID: <cover.1432003804.git.shli@fb.com> (raw)
Hi,
This is the second 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.
Main changes of V2 are to improve performance. Meta data write doesn't use FUA
any more. Discard request is only dispatched when discard range is big enough.
Also have some bug fixing and code cleanup. Please review!
Thanks,
Shaohua
Shaohua Li (5):
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
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 | 3519 ++++++++++++++++++++++++++++++++++++++++
drivers/md/raid5.c | 97 +-
drivers/md/raid5.h | 16 +-
include/uapi/linux/raid/md_p.h | 73 +
7 files changed, 3705 insertions(+), 20 deletions(-)
create mode 100644 drivers/md/raid5-cache.c
--
1.8.1
next reply other threads:[~2015-05-19 2:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-19 2:57 Shaohua Li [this message]
2015-05-19 2:57 ` [PATCH v2 1/6] MD: add a new disk role to present cache device Shaohua Li
2015-05-19 2:57 ` [PATCH v2 2/6] raid5: directly use mddev->queue Shaohua Li
2015-05-19 2:57 ` [PATCH v2 4/6] raid5: add some sysfs entries Shaohua Li
2015-05-19 2:57 ` [PATCH v2 5/6] md: don't allow resize/reshape with cache support Shaohua Li
2015-05-19 2:57 ` [PATCH v2 6/6] raid5: skip resync if caching is enabled Shaohua Li
2015-05-19 9:22 ` [PATCH v2 0/6] a caching layer for raid5/6 Artur Paszkiewicz
2015-05-20 5:23 ` NeilBrown
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cover.1432003804.git.shli@fb.com \
--to=shli@fb.com \
--cc=Kernel-team@fb.com \
--cc=dan.j.williams@intel.com \
--cc=hch@infradead.org \
--cc=linux-raid@vger.kernel.org \
--cc=neilb@suse.de \
--cc=songliubraving@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).