linux-kernel - [PATCH-tip v2 0/3] locking/rwsem: Miscellaneous rwsem enhancements

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Message-Id: <20230216210933.1169097-1-longman@redhat.com>
Date:   Thu, 16 Feb 2023 16:09:30 -0500
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Boqun Feng <boqun.feng@...il.com>
Cc:     linux-kernel@...r.kernel.org, Hillf Danton <hdanton@...a.com>,
        Waiman Long <longman@...hat.com>
Subject: [PATCH-tip v2 0/3] locking/rwsem: Miscellaneous rwsem enhancements

 v2:
  - Break out some code refactoring into a separate patch.
  - Move the early handoff code from rwsem_wake() to rwsem_mark_wake() to
    cover all wakeup conditions as suggested by PeterZ.
  - Simplify the all reader wake up patch.

The second patch in this series is similar to patch 4 of the v7 patch
series [1]. So it should provide similar performance benefit.  Patch 3
is another minor enhancement about reader wakeup for some specific
use cases.

[1] https://lore.kernel.org/lkml/20230126003628.365092-1-longman@redhat.com/

Waiman Long (3):
  locking/rwsem: Minor code refactoring in rwsem_mark_wake()
  locking/rwsem: Enable early rwsem writer lock handoff
  locking/rwsem: Wake up all readers for wait queue waker

 kernel/locking/lock_events_list.h |   1 +
 kernel/locking/rwsem.c            | 133 ++++++++++++++++++++++--------
 2 files changed, 99 insertions(+), 35 deletions(-)

-- 
2.31.1