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dc89e75a94
This allows (with a previous change to the perf error return ABI) for calling out in userspace the exact reason for perf record failing when PMU doesn't support overflow interrupts. Note that this needs to be put ahead of existing precise_ip check as that gets hit otherwise for the sampling fail case as well. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: <acme@redhat.com> Cc: <linux-snps-arc@lists.infradead.org> Cc: <vincent.weaver@maine.edu> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com> Link: http://lkml.kernel.org/r/1462786660-2900-2-git-send-email-vgupta@synopsys.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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