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