Re: [PATCH v6 3/4] bpf: Implement function bpf_perf_event_read() that get the selected hardware PMU conuter
From: Peter Zijlstra <peterz@infradead.org>
Date: 2015-08-05 10:15:20
Also in:
lkml
On Wed, Aug 05, 2015 at 12:04:25PM +0200, Peter Zijlstra wrote:
On Tue, Aug 04, 2015 at 08:58:15AM +0000, Kaixu Xia wrote:
quoted
+ event->ctx->task != current)
Strictly speaking we should hold rcu_read_lock around dereferencing event->ctx (or have IRQs disabled -- although I know Paul doesn't like us relying on that).