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Re: [RFC 2/2] perf/core: change errno for sampling event not supported in hardware

From Vince Weaver <vincent.weaver@maine.edu>
Newsgroups linux.kernel
Subject Re: [RFC 2/2] perf/core: change errno for sampling event not supported in hardware
Date 2016-05-13 01:10 +0200
Message-ID <ry7TX-7Gm-5@gated-at.bofh.it> (permalink)
References (4 earlier) <rxI9b-6rJ-7@gated-at.bofh.it> <rxSid-7O-5@gated-at.bofh.it> <rxSBz-im-11@gated-at.bofh.it> <rxSLg-mB-17@gated-at.bofh.it> <rxTeh-WJ-5@gated-at.bofh.it>
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On Thu, 12 May 2016, Peter Zijlstra wrote:

> Ah.. which might be a hint that nobody is actually explicitly testing
> for this and we might just get away with changing the ABI.
> 
> Vince, what say you; shall we try and get away with it? ;-)

It's probably worth trying.

The only other time anyone else noticed was in this thread
	https://lkml.org/lkml/2015/6/11/136
and I think the conclusion at the end of that was also that it's probably 
worth changing.

Vince

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Thread

[RFC 0/2] report perf sampling failing due to PMU lacking overflow intr support Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-09 11:40 +0200
  [RFC 2/2] perf/core: change errno for sampling event not supported in hardware Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-09 11:40 +0200
    Re: [RFC 2/2] perf/core: change errno for sampling event not supported  in hardware Vince Weaver <vincent.weaver@maine.edu> - 2016-05-09 16:00 +0200
      Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Vineet Gupta <vgupta@synopsys.com> - 2016-05-09 19:30 +0200
        Re: [RFC 2/2] perf/core: change errno for sampling event not supported  in hardware Vince Weaver <vincent.weaver@maine.edu> - 2016-05-11 05:40 +0200
        Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Peter Zijlstra <peterz@infradead.org> - 2016-05-11 21:40 +0200
          Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-12 08:30 +0200
            Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Peter Zijlstra <peterz@infradead.org> - 2016-05-12 08:50 +0200
              Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-12 09:00 +0200
                Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Peter Zijlstra <peterz@infradead.org> - 2016-05-12 09:30 +0200
                Re: [RFC 2/2] perf/core: change errno for sampling event not supported  in hardware Vince Weaver <vincent.weaver@maine.edu> - 2016-05-13 01:10 +0200
                Re: [RFC 2/2] perf/core: change errno for sampling event not  supported in hardware Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-13 10:40 +0200
                [PATCH-REBASED 0/2] report perf sampling failing due to PMU lacking overflow intr support Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-30 13:40 +0200
                [PATCH-REBASED 1/2] tools/perf: Handle EOPNOTSUPP for sampling events Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-30 13:40 +0200
                [PATCH-REBASED 2/2] perf/core: change errno for sampling event not supported in hardware Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-05-30 13:40 +0200

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