Re: [PATCH v6 3/4] bpf: Implement function bpf_perf_event_read() that get the selected hardware PMU conuter
From: Alexei Starovoitov <hidden>
Date: 2015-08-05 16:00:47
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On 8/5/15 3:15 AM, Peter Zijlstra wrote:
On Wed, Aug 05, 2015 at 12:04:25PM +0200, Peter Zijlstra wrote:quoted
On Tue, Aug 04, 2015 at 08:58:15AM +0000, Kaixu Xia wrote:quoted
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).
programs are always executing under rcu_read_lock, so we should be good here too.