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Date: Fri, 9 Dec 2016 11:10:23 -0500 From: Waiman Long <longman@...hat.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org, Pan Xinhui <xinhui@...ux.vnet.ibm.com>, Boqun Feng <boqun.feng@...il.com>, Will Deacon <will.deacon@....com> Subject: Re: [PATCH-tip] locking/pvqspinlock: Relax cmpxchg's to improve performance on some archs 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
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