Re: [PATCH] PERF(kernel): Cleanup power events V2
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- Subject: Re: [PATCH] PERF(kernel): Cleanup power events V2
- From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- Date: Tue, 26 Oct 2010 19:58:14 +0200
- Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Thomas Renninger <trenn@xxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>, Frank Eigler <fche@xxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>, linux-omap@xxxxxxxxxxxxxxx, rjw@xxxxxxx, linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-trace-users@xxxxxxxxxxxxxxx, Jean Pihet <jean.pihet@xxxxxxxxxxxxxx>, Frederic Weisbecker <fweisbec@xxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
- In-reply-to: <AANLkTinrmhBkjnXE+xQGgrsv_OR_ckz=dyH4EoDB59X_@xxxxxxxxxxxxxx>
- References: <1287488171-25303-3-git-send-email-trenn@xxxxxxx> <1288049630-10947-1-git-send-email-trenn@xxxxxxx> <20101026071020.GC13036@xxxxxxx> <AANLkTikWCLTgAGJJ_eH0e016kPfB2K8LtR9g25wbPJXF@xxxxxxxxxxxxxx> <4CC6FC03.708@xxxxxxxxxxxxxxx> <AANLkTinrmhBkjnXE+xQGgrsv_OR_ckz=dyH4EoDB59X_@xxxxxxxxxxxxxx>
On Tue, 2010-10-26 at 11:56 -0500, Pierre Tardy wrote:
>
> + trace_runtime_pm_usage(dev, atomic_read(&dev->power.usage_count)+1);
> atomic_inc(&dev->power.usage_count);
That's terribly racy..
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