This is a note to let you know that I've just added the patch titled perf tools: Fix copyfile_offset update of output offset to the 4.4-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-tools-fix-copyfile_offset-update-of-output-offset.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Tue Apr 10 10:31:53 CEST 2018 From: Jiri Olsa <jolsa@xxxxxxxxxx> Date: Tue, 9 Jan 2018 14:39:23 +0100 Subject: perf tools: Fix copyfile_offset update of output offset From: Jiri Olsa <jolsa@xxxxxxxxxx> [ Upstream commit fa1195ccc0af2d121abe0fe266a1caee8c265eea ] 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> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/perf/util/util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -162,7 +162,7 @@ int copyfile_offset(int ifd, loff_t off_ size -= ret; off_in += ret; - off_out -= ret; + off_out += ret; } munmap(ptr, off_in + size); Patches currently in stable-queue which might be from jolsa@xxxxxxxxxx are queue-4.4/perf-trace-add-mmap-alias-for-s390.patch queue-4.4/perf-tools-fix-copyfile_offset-update-of-output-offset.patch queue-4.4/perf-core-correct-event-creation-with-perf_format_group.patch queue-4.4/perf-tests-decompress-kernel-module-before-objdump.patch queue-4.4/perf-header-set-proper-module-name-when-build-id-event-found.patch