Patch "perf tools: Fix copyfile_offset update of output offset" has been added to the 4.15-stable tree

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 4.15-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-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Jiri Olsa <[email protected]>
Date: Tue, 9 Jan 2018 14:39:23 +0100
Subject: perf tools: Fix copyfile_offset update of output offset

From: Jiri Olsa <[email protected]>

[ 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.

---
 tools/perf/util/util.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -210,7 +210,7 @@ static int copyfile_offset(int ifd, loff
 
 		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 [email protected] are

queue-4.15/perf-evsel-fix-swap-for-samples-with-raw-data.patch queue-4.15/perf-tools-fix-copyfile_offset-update-of-output-offset.patch queue-4.15/perf-report-fix-a-no-annotate-browser-displayed-issue.patch