Commit-ID: fa1195ccc0af2d121abe0fe266a1caee8c265eea
Gitweb: https://git.kernel.org/tip/fa1195ccc0af2d121abe0fe266a1caee8c265eea
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Tue, 9 Jan 2018 14:39:23 +0100
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 12 Jan 2018 16:57:16 -0300
perf tools: Fix copyfile_offset update of output offset
We need to increase output offset in each iteration, not decrease it as
we currently do.
I guess we were lucky to finish in most cases in first iteration, so the
bug never showed. However it shows a lot when working with big (~4GB)
size data.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Fixes: 9c9f5a2f1944 ("perf tools: Introduce copyfile_offset() function")
Link: http://lkml.kernel.org/r/20180109133923.25406-1-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/util.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index a789f95..443892d 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -210,7 +210,7 @@ static int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64
size -= ret;
off_in += ret;
- off_out -= ret;
+ off_out += ret;
}
munmap(ptr, off_in + size);
--
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