* Patch "perf evsel: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus" has been added to the 4.18-stable tree
@ 2018-11-10 18:49 gregkh at linuxfoundation.org
0 siblings, 0 replies; only message in thread
From: gregkh at linuxfoundation.org @ 2018-11-10 18:49 UTC (permalink / raw)
To: linux-arm-kernel
This is a note to let you know that I've just added the patch titled
perf evsel: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus
to the 4.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-evsel-store-ids-for-events-with-their-own-cpus-perf_event__synthesize_event_update_cpus.patch
and it can be found in the queue-4.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger•kernel.org> know about it.
>From foo at baz Sat Nov 10 10:48:43 PST 2018
From: Jiri Olsa <jolsa@redhat•com>
Date: Wed, 3 Oct 2018 23:20:52 +0200
Subject: perf evsel: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus
From: Jiri Olsa <jolsa@redhat•com>
[ Upstream commit 4ab8455f8bd83298bf7f67ab9357e3b1cc765c7d ]
John reported crash when recording on an event under PMU with cpumask defined:
root at localhost:~# ./perf_debug_ record -e armv8_pmuv3_0/br_mis_pred/ sleep 1
perf: Segmentation fault
Obtained 9 stack frames.
./perf_debug_() [0x4c5ef8]
[0xffff82ba267c]
./perf_debug_() [0x4bc5a8]
./perf_debug_() [0x419550]
./perf_debug_() [0x41a928]
./perf_debug_() [0x472f58]
./perf_debug_() [0x473210]
./perf_debug_() [0x4070f4]
/lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe0) [0xffff8294c8a0]
Segmentation fault (core dumped)
We synthesize an update event that needs to touch the evsel id array, which is
not defined at that time. Fixing this by forcing the id allocation for events
with their own cpus.
Reported-by: John Garry <john.garry@huawei•com>
Signed-off-by: Jiri Olsa <jolsa@kernel•org>
Tested-by: John Garry <john.garry@huawei•com>
Cc: Alexander Shishkin <alexander.shishkin@linux•intel.com>
Cc: Andi Kleen <ak@linux•intel.com>
Cc: Mark Rutland <mark.rutland@arm•com>
Cc: Namhyung Kim <namhyung@kernel•org>
Cc: Peter Zijlstra <peterz@infradead•org>
Cc: Will Deacon <will.deacon@arm•com>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linuxarm at huawei.com
Fixes: bfd8f72c2778 ("perf record: Synthesize unit/scale/... in event update")
Link: http://lkml.kernel.org/r/20181003212052.GA32371 at krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat•com>
Signed-off-by: Sasha Levin <sashal@kernel•org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation•org>
---
tools/perf/builtin-report.c | 1 +
tools/perf/util/evsel.c | 3 +++
2 files changed, 4 insertions(+)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -981,6 +981,7 @@ int cmd_report(int argc, const char **ar
.id_index = perf_event__process_id_index,
.auxtrace_info = perf_event__process_auxtrace_info,
.auxtrace = perf_event__process_auxtrace,
+ .event_update = perf_event__process_event_update,
.feature = process_feature_event,
.ordered_events = true,
.ordering_requires_timestamps = true,
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1078,6 +1078,9 @@ void perf_evsel__config(struct perf_evse
attr->exclude_user = 1;
}
+ if (evsel->own_cpus)
+ evsel->attr.read_format |= PERF_FORMAT_ID;
+
/*
* Apply event specific term settings,
* it overloads any global configuration.
Patches currently in stable-queue which might be from jolsa at redhat.com are
queue-4.18/perf-vendor-events-intel-fix-wrong-filter_band-values-for-uncore-events.patch
queue-4.18/perf-tools-fix-use-of-alternatives-to-find-jdir.patch
queue-4.18/perf-evsel-store-ids-for-events-with-their-own-cpus-perf_event__synthesize_event_update_cpus.patch
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2018-11-10 18:49 Patch "perf evsel: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus" has been added to the 4.18-stable tree gregkh at linuxfoundation.org
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