Re: [PATCH] perf powerpc: Don't call perf_event_disable from atomic context

From	Michael Ellerman <mpe@ellerman.id.au>
Newsgroups	linux.kernel
Subject	Re: [PATCH] perf powerpc: Don't call perf_event_disable from atomic context
Date	2016-10-04 06:10 +0200
Message-ID	<sopdf-5Kn-7@gated-at.bofh.it> (permalink)
References	<sjQe5-1dU-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Jiri Olsa <jolsa@kernel.org> writes:

> The trinity syscall fuzzer triggered following WARN on powerpc:
>   WARNING: CPU: 9 PID: 2998 at arch/powerpc/kernel/hw_breakpoint.c:278
>   ...
>   NIP [c00000000093aedc] .hw_breakpoint_handler+0x28c/0x2b0
>   LR [c00000000093aed8] .hw_breakpoint_handler+0x288/0x2b0
>   Call Trace:
>   [c0000002f7933580] [c00000000093aed8] .hw_breakpoint_handler+0x288/0x2b0 (unreliable)
>   [c0000002f7933630] [c0000000000f671c] .notifier_call_chain+0x7c/0xf0
>   [c0000002f79336d0] [c0000000000f6abc] .__atomic_notifier_call_chain+0xbc/0x1c0
>   [c0000002f7933780] [c0000000000f6c40] .notify_die+0x70/0xd0
>   [c0000002f7933820] [c00000000001a74c] .do_break+0x4c/0x100
>   [c0000002f7933920] [c0000000000089fc] handle_dabr_fault+0x14/0x48

Is that the full stack trace? It doesn't look like it.

And were you running trinity as root or regular user?

cheers

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Re: [PATCH] perf powerpc: Don't call perf_event_disable from atomic context Michael Ellerman <mpe@ellerman.id.au> - 2016-10-04 06:10 +0200
  Re: [PATCH] perf powerpc: Don't call perf_event_disable from atomic  context Jiri Olsa <jolsa@redhat.com> - 2016-10-05 10:10 +0200
  Re: [PATCH] perf powerpc: Don't call perf_event_disable from atomic  context Jan Stancek <jstancek@redhat.com> - 2016-10-05 10:30 +0200

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