Re: [PATCH 1/3] perf_event: fix race inperf_swevent_get_recursion_context()

From: Peter Zijlstra
Date: Mon Jan 18 2010 - 08:56:20 EST

On Mon, 2010-01-18 at 21:42 +0800, Xiao Guangrong wrote:
> It only disable preemption in perf_swevent_get_recursion_context()
> it can't avoid race of hard-irq and NMI
> In this patch, we use atomic operation to avoid it and reduce
> cpu_ctx->recursion size, it also make this patch no need diable
> preemption

Uhm why?

This patch looks terminally broken

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at