From: Waiman Long <longman@redhat.com>
To: Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, Davidlohr Bueso <dave@stgolabs.net>,
Waiman Long <longman@redhat.com>
Subject: [PATCH-tip 0/3] locking/rwsem: Minor twists to improve rwsem performance
Date: Wed, 22 Feb 2017 13:03:51 -0500 [thread overview]
Message-ID: <1487786634-22641-1-git-send-email-longman@redhat.com> (raw)
Patch 1 checks wait_list without lock when spinners are present.
Patch 2 moves down the rwsem_down_read_failed() function after the
optimistic spinning section so that functions in that section can
be used.
Patch 3 undoes active read lock ASAP when either the spinners are
present or the trylock fails.
Waiman Long (3):
locking/rwsem: Check wait_list without lock if spinner present
locking/rwsem: move down rwsem_down_read_failed()
locking/rwsem: Stop active read lock ASAP
kernel/locking/rwsem-xadd.c | 126 +++++++++++++++++++++++++++-----------------
1 file changed, 78 insertions(+), 48 deletions(-)
--
1.8.3.1
next reply other threads:[~2017-02-22 18:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-22 18:03 Waiman Long [this message]
2017-02-22 18:03 ` [PATCH-tip 1/3] locking/rwsem: Check wait_list without lock if spinner present Waiman Long
2017-02-26 18:49 ` Davidlohr Bueso
2017-02-27 15:02 ` Waiman Long
2017-02-22 18:03 ` [PATCH-tip 2/3] locking/rwsem: move down rwsem_down_read_failed() Waiman Long
2017-02-26 18:33 ` Davidlohr Bueso
2017-02-27 14:22 ` Waiman Long
2017-02-22 18:03 ` [PATCH-tip 3/3] locking/rwsem: Stop active read lock ASAP Waiman Long
2017-02-26 18:58 ` Davidlohr Bueso
2017-02-27 15:07 ` Waiman Long
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