From: Waiman Long <longman@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org,
Pan Xinhui <xinhui@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH-tip] locking/pvqspinlock: Relax cmpxchg's to improve performance on some archs
Date: Fri, 9 Dec 2016 11:10:23 -0500 [thread overview]
Message-ID: <192df241-642b-9b04-dd5c-31597bf9c574@redhat.com> (raw)
In-Reply-To: <20161209160534.GX3124@twins.programming.kicks-ass.net>
On 12/09/2016 11:05 AM, Peter Zijlstra wrote:
> On Tue, Dec 06, 2016 at 02:14:42PM -0500, Waiman Long wrote:
>> A number of cmpxchg calls in qspinlock_paravirt.h were replaced by more
>> relaxed versions to improve performance on architectures that use LL/SC.
> I would feel so much better if each change were to have some rationale
> included. Either enumerate them in the changelog, or split them up into
> smaller patches.
>
>
OK, I will update the patch to either document them with comments or
enumerate them in the change log.
Cheers,
Longman
prev parent reply other threads:[~2016-12-09 16:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 19:14 Waiman Long
2016-12-08 0:38 ` Pan Xinhui
2016-12-09 16:05 ` Peter Zijlstra
2016-12-09 16:10 ` Waiman Long [this message]
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