From: Peter Zijlstra <peterz@infradead.org>
To: Waiman Long <longman@redhat.com>
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 17:05:34 +0100 [thread overview]
Message-ID: <20161209160534.GX3124@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1481051682-29438-1-git-send-email-longman@redhat.com>
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.
next prev parent reply other threads:[~2016-12-09 16:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 19:14 [PATCH-tip] locking/pvqspinlock: Relax cmpxchg's to improve performance on some archs Waiman Long
2016-12-08 0:38 ` Pan Xinhui
2016-12-09 16:05 ` Peter Zijlstra [this message]
2016-12-09 16:10 ` Waiman Long
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