From: Shan Wei <shanwei88@gmail.com>
To: paulmck@linux.vnet.ibm.com
Cc: Christoph Lameter <cl@linux.com>,
dipankar@in.ibm.com,
Kernel-Maillist <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 7/9] rcu: use this_cpu_ptr per-cpu helper instead of per_cpu_ptr(p, raw_smp_processor_id())
Date: Thu, 01 Nov 2012 17:09:03 +0800 [thread overview]
Message-ID: <50923C2F.6060200@gmail.com> (raw)
In-Reply-To: <20121031200842.GC3027@linux.vnet.ibm.com>
Paul E. McKenney said, at 2012/11/1 4:08:
>
> One thing to keep in mind -- the only purpose of this is to diffuse
> memory contention. So there is no need to disable preemption.
same question to me.
Christoph, maybe __this_cpu_read is a better choice which don't disable preemption.
>
> Thanx, Paul
>
>
next prev parent reply other threads:[~2012-11-01 9:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-31 11:23 [PATCH 7/9] rcu: use this_cpu_ptr per-cpu helper instead of per_cpu_ptr(p, raw_smp_processor_id()) Shan Wei
2012-10-31 11:51 ` Paul E. McKenney
2012-10-31 13:20 ` Shan Wei
2012-10-31 13:35 ` Paul E. McKenney
2012-10-31 17:47 ` Christoph Lameter
2012-10-31 20:08 ` Paul E. McKenney
2012-11-01 9:09 ` Shan Wei [this message]
2012-11-01 14:32 ` Christoph Lameter
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