This is a note to let you know that I've just added the patch titled
perf tools: Decompress kernel module when reading DSO data
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: perf-tools-decompress-kernel-module-when-reading-dso-data.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 17:09:24 CEST 2018
From: Namhyung Kim namhyung@kernel.org Date: Thu, 8 Jun 2017 16:31:05 +0900 Subject: perf tools: Decompress kernel module when reading DSO data
From: Namhyung Kim namhyung@kernel.org
[ Upstream commit 1d6b3c9ba756a5134fd7ad1959acac776d17404b ]
Currently perf decompresses kernel modules when loading the symbol table but it missed to do it when reading raw data.
Signed-off-by: Namhyung Kim namhyung@kernel.org Acked-by: Jiri Olsa jolsa@kernel.org Cc: Adrian Hunter adrian.hunter@intel.com Cc: David Ahern dsahern@gmail.com Cc: Peter Zijlstra a.p.zijlstra@chello.nl Cc: Wang Nan wangnan0@huawei.com Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170608073109.30699-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/util/dso.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
--- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -366,7 +366,23 @@ static int __open_dso(struct dso *dso, s if (!is_regular_file(name)) return -EINVAL;
+ if (dso__needs_decompress(dso)) { + char newpath[KMOD_DECOMP_LEN]; + size_t len = sizeof(newpath); + + if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { + free(name); + return -dso->load_errno; + } + + strcpy(name, newpath); + } + fd = do_open(name); + + if (dso__needs_decompress(dso)) + unlink(name); + free(name); return fd; }
Patches currently in stable-queue which might be from namhyung@kernel.org are
queue-4.9/perf-report-fix-off-by-one-for-non-activation-frames.patch queue-4.9/perf-trace-add-mmap-alias-for-s390.patch queue-4.9/perf-report-ensure-the-perf-dso-mapping-matches-what-libdw-sees.patch queue-4.9/perf-tools-fix-copyfile_offset-update-of-output-offset.patch queue-4.9/perf-tools-decompress-kernel-module-when-reading-dso-data.patch queue-4.9/perf-tests-decompress-kernel-module-before-objdump.patch queue-4.9/perf-header-set-proper-module-name-when-build-id-event-found.patch