This is a note to let you know that I've just added the patch titled
perf inject: Fix repipe usage
to the 5.4-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-inject-fix-repipe-usage.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 41e9cd56c9f5566447ee98477a2cc37323e56ec2
Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Thu Apr 1 13:36:05 2021 +0300
perf inject: Fix repipe usage
[ Upstream commit 026334a3bb6a3919b42aba9fc11843db2b77fd41 ]
Since commit 14d3d54052539a1e ("perf session: Try to read pipe data from
file") 'perf inject' has started printing "PERFILE2h" when not processing
pipes.
The commit exposed perf to the possiblity that the input is not a pipe
but the 'repipe' parameter gets used. That causes the printing because
perf inject sets 'repipe' to true always.
The 'repipe' parameter of perf_session__new() is used by 2 functions:
- perf_file_header__read_pipe()
- trace_report()
In both cases, the functions copy data to STDOUT_FILENO when 'repipe' is
true.
Fix by setting 'repipe' to true only if the output is a pipe.
Fixes: e558a5bd8b74aff4 ("perf inject: Work with files")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Andrew Vagin <avagin@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20210401103605.9000-1-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 372ecb3e2c06..0d524ef3606d 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -835,7 +835,7 @@ int cmd_inject(int argc, const char **argv)
inject.tool.ordered_events = inject.sched_stat;
data.path = inject.input_name;
- inject.session = perf_session__new(&data, true, &inject.tool);
+ inject.session = perf_session__new(&data, inject.output.is_pipe, &inject.tool);
if (IS_ERR(inject.session))
return PTR_ERR(inject.session);
