linux-kernel - [PATCH -tip 0/2] locking/rwbase: Two reader optimizations

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Message-Id: <20210920052031.54220-1-dave@stgolabs.net>
Date:   Sun, 19 Sep 2021 22:20:29 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     tglx@...utronix.de
Cc:     peterz@...radead.org, mingo@...nel.org, rostedt@...dmis.org,
        longman@...hat.com, bigeasy@...utronix.de, boqun.feng@...il.com,
        dave@...olabs.net, linux-kernel@...r.kernel.org
Subject: [PATCH -tip 0/2] locking/rwbase: Two reader optimizations

Hi,

Patch 1 is a barrier optimization that came up from the reader
fastpath ordering auditing.

Patch 2 is a resend of the previous broken patch that attempts
to use wake_q for read_unlock() slowpath.

Tested on v5.15.y-rt. Applies against tip/urgent.

Thanks!

Davidlohr Bueso (2):
  locking/rwbase: Optimize rwbase_read_trylock
  locking/rwbase: Lockless reader waking up a writer

 kernel/locking/rtmutex.c   | 19 +++++++++++++------
 kernel/locking/rwbase_rt.c | 11 +++++++----
 2 files changed, 20 insertions(+), 10 deletions(-)

--
2.26.2