Stephane Eranian 103eb70cf4 perf/core: Restore mmap record type correctly ... [ Upstream commit d9c1bb2f6a ] On mmap(), perf_events generates a RECORD_MMAP record and then checks which events are interested in this record. There are currently 2 versions of mmap records: RECORD_MMAP and RECORD_MMAP2. MMAP2 is larger. The event configuration controls which version the user level tool accepts. If the event->attr.mmap2=1 field then MMAP2 record is returned. The perf_event_mmap_output() takes care of this. It checks attr->mmap2 and corrects the record fields before putting it in the sampling buffer of the event. At the end the function restores the modified MMAP record fields. The problem is that the function restores the size but not the type. Thus, if a subsequent event only accepts MMAP type, then it would instead receive an MMAP2 record with a size of MMAP record. This patch fixes the problem by restoring the record type on exit. Signed-off-by: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Fixes: 13d7a2410f ("perf: Add attr->mmap2 attribute to an event") Link: http://lkml.kernel.org/r/20190307185233.225521-1-eranian@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-04-20 09:14:59 +02:00
..
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
callchain.c	perf: Remove superfluous allocation error check	2018-05-16 10:10:24 +02:00
core.c	perf/core: Restore mmap record type correctly	2019-04-20 09:14:59 +02:00
hw_breakpoint.c	perf/hwbp: Simplify the perf-hwbp code, fix documentation	2018-04-08 14:26:27 +02:00
internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ring_buffer.c	perf/core: Fix impossible ring-buffer sizes warning	2019-02-20 10:20:51 +01:00
uprobes.c	uprobes: Fix handle_swbp() vs. unregister() + register() race once more	2018-12-08 13:03:36 +01:00