From: Mel Gorman <mgorman@techsingularity.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>, Jan Kara <jack@suse.cz>,
Linux-FSDevel <linux-fsdevel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Mel Gorman <mgorman@techsingularity.net>
Subject: [PATCH 0/2] Avoid unnecessary page locks in the generic read path v2r1
Date: Tue, 26 Jan 2016 14:09:28 +0000 [thread overview]
Message-ID: <1453817370-10399-1-git-send-email-mgorman@techsingularity.net> (raw)
Changelog since V1
o Use lock_page_killable consistently do_generic_file_read (jan)
A long time ago there was an attempt to merge a patch that reduced the
cost of unlock_page by avoiding the page_waitqueue lookup if there were no
waiters. It was rejected on the grounds of complexity but it was pointed
out that the read paths call lock_page unnecessarily. This series reduces
the number of calls to lock_page when multiple processes read data in at
the same time.
mm/filemap.c | 90 ++++++++++++++++++++++++++++++++++++++++--------------------
1 file changed, 60 insertions(+), 30 deletions(-)
--
2.6.4
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WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mgorman@techsingularity.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>, Jan Kara <jack@suse.cz>,
Linux-FSDevel <linux-fsdevel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Mel Gorman <mgorman@techsingularity.net>
Subject: [PATCH 0/2] Avoid unnecessary page locks in the generic read path v2r1
Date: Tue, 26 Jan 2016 14:09:28 +0000 [thread overview]
Message-ID: <1453817370-10399-1-git-send-email-mgorman@techsingularity.net> (raw)
Changelog since V1
o Use lock_page_killable consistently do_generic_file_read (jan)
A long time ago there was an attempt to merge a patch that reduced the
cost of unlock_page by avoiding the page_waitqueue lookup if there were no
waiters. It was rejected on the grounds of complexity but it was pointed
out that the read paths call lock_page unnecessarily. This series reduces
the number of calls to lock_page when multiple processes read data in at
the same time.
mm/filemap.c | 90 ++++++++++++++++++++++++++++++++++++++++--------------------
1 file changed, 60 insertions(+), 30 deletions(-)
--
2.6.4
next reply other threads:[~2016-01-26 14:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-26 14:09 Mel Gorman [this message]
2016-01-26 14:09 ` [PATCH 0/2] Avoid unnecessary page locks in the generic read path v2r1 Mel Gorman
2016-01-26 14:09 ` [PATCH 1/2] mm: filemap: Remove redundant code in do_read_cache_page Mel Gorman
2016-01-26 14:09 ` Mel Gorman
2016-01-26 14:09 ` [PATCH 2/2] mm: filemap: Avoid unnecessary calls to lock_page when waiting for IO to complete during a read Mel Gorman
2016-01-26 14:09 ` Mel Gorman
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