Kan Liang ab7fdefba6 perf/core: Fix implicitly enable dynamic interrupt throttle ... This patch fixes an issue which was introduced by commit: 91a612eea9 ("perf/core: Fix dynamic interrupt throttle") ... which commit unconditionally sets the perf_sample_allowed_ns value to !0. But that could trigger a bug in the following corner case: The user can disable the dynamic interrupt throttle mechanism by setting perf_cpu_time_max_percent to 0. Then they change perf_event_max_sample_rate. For this case, the mechanism will be enabled implicitly, because perf_sample_allowed_ns becomes !0 - which is not what we want. This patch only updates perf_sample_allowed_ns when the dynamic interrupt throttle mechanism is enabled. Signed-off-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> 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: acme@kernel.org Link: http://lkml.kernel.org/r/1462260366-3160-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-06-03 09:40:16 +02:00
..
callchain.c	perf core: Per event callchain limit	2016-05-30 12:41:44 -03:00
core.c	perf/core: Fix implicitly enable dynamic interrupt throttle	2016-06-03 09:40:16 +02:00
hw_breakpoint.c	perf: Collapse and fix event_function_call() users	2016-01-21 18:54:24 +01:00
internal.h	Linux 4.6-rc3	2016-04-13 08:57:03 +02:00
Makefile	ftrace: allow architectures to specify ftrace compile options	2015-01-29 09:19:19 +01:00
ring_buffer.c	perf/core: Disable the event on a truncated AUX record	2016-05-12 10:14:55 +02:00
uprobes.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00