From: Waiman Long <longman@redhat.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Will Deacon <will.deacon@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] locking changes for v5.2
Date: Tue, 7 May 2019 10:39:25 -0400 [thread overview]
Message-ID: <34c5c50d-cfe7-4b19-e889-62955d286f29@redhat.com> (raw)
In-Reply-To: <20190506194339.GA20938@gmail.com>
On 5/6/19 3:43 PM, Ingo Molnar wrote:
> * Waiman Long <longman9394@gmail.com> wrote:
>
>> On 5/6/19 4:50 AM, Ingo Molnar wrote:
>>> Linus,
>>>
>>> Please pull the latest locking-core-for-linus git tree from:
>>>
>>> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-for-linus
>>>
>>> # HEAD: d671002be6bdd7f77a771e23bf3e95d1f16775e6 locking/lockdep: Remove unnecessary unlikely()
>>>
>>> [ Dependency note: this tree depends on commits also in the RCU tree,
>>> please disregard this pull request if you weren't able to pull the RCU
>>> tree for some reason. ]
>>>
>>> Here are the locking changes in this cycle:
>>>
>>> - rwsem unification and simpler micro-optimizations to prepare for more
>>> intrusive (and more lucrative) scalability improvements in v5.3
>>> (Waiman Long)
>> Is it possible to pull in also my "locking/rwsem: Prevent decrement of
>> reader count before increment" patch for 5.2? The rests can wait until 5.3.
> Sure - how close is this to a straight:
>
> git revert 70800c3c0cc5
>
> ?
>
> If it's close enough then please resubmit this as a 'Revert "..."' patch,
> which I'll queue up in locking/urgent.
As explained by Linus, it is not a straight revert.
> It also is a performance, not a correctness fix, and should probably get
> a Cc: stable as well, right?
This patch is not for performance. It is fixing a regression and it does
have a cc: stable tag.
Thanks you for your help as I would like to backport the fix downstream.
Cheers,
Longman
next prev parent reply other threads:[~2019-05-07 14:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-06 8:50 [GIT PULL] locking changes for v5.2 Ingo Molnar
2019-05-06 16:11 ` Waiman Long
2019-05-06 19:43 ` Ingo Molnar
2019-05-06 20:55 ` Linus Torvalds
2019-05-06 22:39 ` Ingo Molnar
2019-05-07 8:24 ` Ingo Molnar
2019-05-07 14:39 ` Waiman Long [this message]
2019-05-06 23:40 ` pr-tracker-bot
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