[PATCH-REBASED 0/2] report perf sampling failing due to PMU lacking overflow intr support

From: Vineet Gupta
Date: Mon May 30 2016 - 07:32:16 EST


This is a repost of RFC [1], rebased on 4.7-rc1, to print pretty PMU lacking
overflow interrupt support if user tries perf sampling.

At the time of RFC review, both PeterZ and Vince seemed convinced to go ahead
with this patch despite the ABI change [2].


[1] http://lists.infradead.org/pipermail/linux-snps-arc/2016-May/001014.html
[2] http://lists.infradead.org/pipermail/linux-snps-arc/2016-May/001032.html

Vineet Gupta (2):
tools/perf: Handle EOPNOTSUPP for sampling events
perf/core: change errno for sampling event not supported in hardware

kernel/events/core.c | 2 +-
tools/perf/util/evsel.c | 7 +++++++
2 files changed, 8 insertions(+), 1 deletion(-)