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From: tip-bot for David Miller <>
Subject: [tip:perf/urgent] perf cpu_map: Align cpu map synthesized events properly.
Date: Wed, 17 Oct 2018 23:19:39 -0700	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Commit-ID:  0ed149cf5239cc6e7e65bf00f769e8f1e91076c0
Author:     David Miller <>
AuthorDate: Thu, 11 Oct 2018 22:46:55 -0700
Committer:  Arnaldo Carvalho de Melo <>
CommitDate: Tue, 16 Oct 2018 12:30:03 -0300

perf cpu_map: Align cpu map synthesized events properly.

The size of the resulting cpu map can be smaller than a multiple of
sizeof(u64), resulting in SIGBUS on cpus like Sparc as the next event
will not be aligned properly.

Signed-off-by: David S. Miller <>
Cc: Jiri Olsa <>
Cc: Kan Liang <>
Fixes: 6c872901af07 ("perf cpu_map: Add cpu_map event synthesize function")
Signed-off-by: Arnaldo Carvalho de Melo <>
 tools/perf/util/event.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 0cd42150f712..0988eb3b844b 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1081,6 +1081,7 @@ void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max
 	*size += sizeof(struct cpu_map_data);
+	*size = PERF_ALIGN(*size, sizeof(u64));
 	return zalloc(*size);

      parent reply	other threads:[~2018-10-18  6:19 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-12  5:46 [PATCH] perf: Align cpu map events properly David Miller
2018-10-16 15:29 ` Arnaldo Carvalho de Melo
2018-10-18  6:19 ` tip-bot for David Miller [this message]

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