From: Matthew Wilcox <willy@infradead.org>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Matthew Wilcox <mawilcox@microsoft.com>
Subject: [PATCH v2 0/4] Bitmap optimisations
Date: Wed, 28 Jun 2017 08:32:17 -0700 [thread overview]
Message-ID: <20170628153221.11322-1-willy@infradead.org> (raw)
From: Matthew Wilcox <mawilcox@microsoft.com>
These three bitmap patches use more efficient specialisations when the
compiler can figure out that it's safe to do so. Thanks to Rasmus'
eagle eyes, a nasty bug in v1 was avoided, and I've added a test case
which would have caught it.
Matthew Wilcox (4):
test_bitmap: Add optimisation tests
bitmap: Optimise bitmap_set and bitmap_clear of a single bit
Turn bitmap_set and bitmap_clear into memset when possible
bitmap: Use memcmp optimisation in more situations
include/linux/bitmap.h | 33 +++++++++++++++++++++++++++------
lib/bitmap.c | 8 ++++----
lib/test_bitmap.c | 29 +++++++++++++++++++++++++++++
3 files changed, 60 insertions(+), 10 deletions(-)
--
2.11.0
next reply other threads:[~2017-06-28 15:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-28 15:32 Matthew Wilcox [this message]
2017-06-28 15:32 ` [PATCH v2 1/4] test_bitmap: Add optimisation tests Matthew Wilcox
2017-06-28 15:32 ` [PATCH v2 2/4] bitmap: Optimise bitmap_set and bitmap_clear of a single bit Matthew Wilcox
2017-06-28 15:32 ` [PATCH v2 3/4] Turn bitmap_set and bitmap_clear into memset when possible Matthew Wilcox
2017-06-28 15:32 ` [PATCH v2 4/4] bitmap: Use memcmp optimisation in more situations Matthew Wilcox
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=20170628153221.11322-1-willy@infradead.org \
--to=willy@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@rasmusvillemoes.dk \
--cc=mawilcox@microsoft.com \
--cc=schwidefsky@de.ibm.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
all inboxes | Powered by JetHome®