[PATCH] Fix mmap error for perf data file. Not all file systems, e.g. JFFS2, support MAP_SHARED.

From	Kenth Eriksson <kenth.eriksson@transmode.com>
Newsgroups	linux.kernel
Subject	[PATCH] Fix mmap error for perf data file. Not all file systems, e.g. JFFS2, support MAP_SHARED.
Date	2015-09-04 09:10 +0200
Message-ID	<q4Tih-3k1-3@gated-at.bofh.it> (permalink)
References	<q4HTR-3EU-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Signed-off-by: Kenth Eriksson <kenth.eriksson@transmode.com>
---
 tools/perf/util/session.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0c74012..c6617fe 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1338,11 +1338,10 @@ static int __perf_session__process_events(struct perf_session *session,
 	memset(mmaps, 0, sizeof(mmaps));
 
 	mmap_prot  = PROT_READ;
-	mmap_flags = MAP_SHARED;
+	mmap_flags = MAP_PRIVATE;
 
 	if (session->header.needs_swap) {
 		mmap_prot  |= PROT_WRITE;
-		mmap_flags = MAP_PRIVATE;
 	}
 remap:
 	buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
-- 
2.3.6

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perf fails to mmap data file (JFFS2) Kenth Eriksson <kenth.eriksson@transmode.com> - 2015-09-03 10:00 +0200
  Re: perf fails to mmap data file (JFFS2) Andi Kleen <andi@firstfloor.org> - 2015-09-03 21:00 +0200
    [PATCH] Fix mmap error for perf data file. Not all file systems, e.g. JFFS2, support MAP_SHARED. Kenth Eriksson <kenth.eriksson@transmode.com> - 2015-09-04 09:10 +0200

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