From: Mike Snitzer <snitzer@redhat.com>
To: dm-devel@redhat.com
Subject: [PATCH v2 0/9] dm: changes staged in linux-next for 5.1 so far
Date: Wed, 20 Feb 2019 16:44:27 -0500 [thread overview]
Message-ID: <20190220214436.38476-1-snitzer@redhat.com> (raw)
This v2 eliminates the dm-mpath local cache for per-bio-data and
switches to allocating the target required per-bio-data as part of the
'struct dm_noclone' allocation -- special thanks to Mikulas for his
ideas and patch (#6) that went into this v2.
Test results show a slight improvement for bio-based dm-multipath (but
not the kind of win dm-linear gets from switching to noclone):
linear: raw=6087MB/s clone=4241MB/s noclone=5148MB/s
mpath: raw=6087MB/s clone=3331MB/s noclone=3420MB/s
More work is needed to improve DM multipath performance (story of my
life)... but at least this shifts the focus away from DM core and back
to the dm-multipath target code.
Mike Snitzer (6):
dm: update dm_process_bio() to split bio if in ->make_request_fn()
dm: eliminate 'split_discard_bios' flag from DM target interface
dm: improve noclone bio support
dm: improve noclone_endio() to support multipath target
dm mpath: enable noclone support for bio-based
dm: remove unused _rq_tio_cache and _rq_cache
Mikulas Patocka (3):
dm: refactor start_io_acct and end_io_acct
dm: implement noclone optimization for bio-based
dm: add per-bio-data support to noclone bio
drivers/md/dm-cache-target.c | 1 -
drivers/md/dm-linear.c | 3 +-
drivers/md/dm-mpath.c | 13 +-
drivers/md/dm-raid.c | 14 +-
drivers/md/dm-rq.c | 16 ++
drivers/md/dm-rq.h | 16 --
drivers/md/dm-stripe.c | 3 +-
drivers/md/dm-table.c | 11 ++
drivers/md/dm-thin.c | 1 -
drivers/md/dm-zero.c | 1 +
drivers/md/dm-zoned-target.c | 1 -
drivers/md/dm.c | 406 ++++++++++++++++++++++++++++--------------
drivers/md/dm.h | 1 +
include/linux/device-mapper.h | 9 +-
include/uapi/linux/dm-ioctl.h | 4 +-
15 files changed, 330 insertions(+), 170 deletions(-)
--
2.15.0
next reply other threads:[~2019-02-20 21:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-20 21:44 Mike Snitzer [this message]
2019-02-20 21:44 ` [PATCH v2 1/9] dm: update dm_process_bio() to split bio if in ->make_request_fn() Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 2/9] dm: eliminate 'split_discard_bios' flag from DM target interface Mike Snitzer
2019-02-21 4:36 ` Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 3/9] dm: refactor start_io_acct and end_io_acct Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 4/9] dm: implement noclone optimization for bio-based Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 5/9] dm: improve noclone bio support Mike Snitzer
2019-02-22 10:59 ` Mikulas Patocka
2019-02-22 15:22 ` Mike Snitzer
2019-02-22 16:56 ` Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 6/9] dm: add per-bio-data support to noclone bio Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 7/9] dm: improve noclone_endio() to support multipath target Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 8/9] dm mpath: enable noclone support for bio-based Mike Snitzer
2019-02-20 21:44 ` [PATCH v2 9/9] dm: remove unused _rq_tio_cache and _rq_cache Mike Snitzer
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=20190220214436.38476-1-snitzer@redhat.com \
--to=snitzer@redhat.com \
--cc=dm-devel@redhat.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