From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
"mingo@elte.hu" <mingo@elte.hu>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"Yan, Zheng" <zheng.z.yan@intel.com>,
Robert Richter <robert.richter@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH v2 1/3] hrtimer: add hrtimer_init_cpu()
Date: Wed, 12 Sep 2012 16:49:11 +0200 [thread overview]
Message-ID: <1347461351.15764.47.camel@twins> (raw)
In-Reply-To: <CABPqkBSCY1N8Zc9ZxRYmQykqg+hiukxW4ZRMWkp9wfaOSzgGrA@mail.gmail.com>
On Wed, 2012-09-12 at 16:46 +0200, Stephane Eranian wrote:
> I am fine with dropping this patch. I just found it odd there was a per-cpu
> data reference embedded deep into the call. I wanted things to be more
> explicit. I know it works without the proposed change.
Ah the reason its there is to make sure the base pointer is a valid base
pointer, this avoids an extra conditional in a number of places. Note
that it uses raw_get_cpu_var(), so it doesn't even actually know which
specific pointer goes in.
next prev parent reply other threads:[~2012-09-12 14:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 14:13 [PATCH v2 0/3] perf: use hrtimer for event multiplexing Stephane Eranian
2012-09-12 14:13 ` [PATCH v2 1/3] hrtimer: add hrtimer_init_cpu() Stephane Eranian
2012-09-12 14:22 ` Eric Dumazet
2012-09-12 14:26 ` Peter Zijlstra
2012-09-12 14:33 ` Stephane Eranian
2012-09-12 14:38 ` Peter Zijlstra
2012-09-12 14:46 ` Stephane Eranian
2012-09-12 14:49 ` Peter Zijlstra [this message]
2012-09-12 14:51 ` Stephane Eranian
2012-09-12 14:13 ` [PATCH v2 2/3] perf: use hrtimer for event multiplexing Stephane Eranian
2012-09-12 14:22 ` Peter Zijlstra
2012-09-12 14:43 ` Stephane Eranian
2012-09-12 14:44 ` Peter Zijlstra
2012-09-12 14:48 ` Stephane Eranian
2012-09-12 14:50 ` Peter Zijlstra
2012-09-12 15:37 ` Stephane Eranian
2012-09-12 15:49 ` Stephane Eranian
2012-09-13 12:16 ` Peter Zijlstra
2012-09-13 12:20 ` Stephane Eranian
2012-09-13 12:26 ` Peter Zijlstra
2012-09-13 12:27 ` Stephane Eranian
2012-09-13 12:29 ` Peter Zijlstra
2012-09-12 14:13 ` [PATCH v2 3/3] perf: add sysfs entry to adjust multiplexing interval per PMU Stephane Eranian
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