linux-kernel - Re: [PATCH v2 0/5] locking/rwsem: Rework reader optimistic spinning

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Date:   Tue, 8 Dec 2020 12:30:26 -0500
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dave@...olabs.net>,
        Phil Auld <pauld@...hat.com>
Subject: Re: [PATCH v2 0/5] locking/rwsem: Rework reader optimistic spinning

On 12/8/20 12:02 PM, Peter Zijlstra wrote:
> On Tue, Dec 08, 2020 at 11:33:38AM -0500, Waiman Long wrote:
>> On 12/8/20 9:57 AM, Peter Zijlstra wrote:
>>> On Fri, Nov 20, 2020 at 11:14:11PM -0500, Waiman Long wrote:
>>>> Waiman Long (5):
>>>>     locking/rwsem: Pass the current atomic count to
>>>>       rwsem_down_read_slowpath()
>>>>     locking/rwsem: Prevent potential lock starvation
>>>>     locking/rwsem: Enable reader optimistic lock stealing
>>>>     locking/rwsem: Wake up all waiting readers if RWSEM_WAKE_READ_OWNED
>>>>     locking/rwsem: Remove reader optimistic spinning
>>> So I've munged the lot onto the other rwsem patches and skipped #4, I've
>>> not even boot tested them (will go do so shortly).
>>>
>>>     git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/core
>>>
>> I have checked the four patches in your locking/core branch. They look good
>> to me. Are you planning to push the branch to tip soon so that it can be
>> ready for the next merge window?
> Yeah, provided the robots don't hate on it more than already reported.
>
Good to know:-)

Cheers,
Longman