Messages in this thread Patch in this message | | | Date | Wed, 31 Oct 2018 15:02:00 -0700 | From | tip-bot for Arnaldo Carvalho de Melo <> | Subject | [tip:perf/urgent] perf trace: Beautify the umount's 'name' argument |
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Commit-ID: 476c92cacf383c83584ba02d06c88cf18f062afb Gitweb: https://git.kernel.org/tip/476c92cacf383c83584ba02d06c88cf18f062afb Author: Arnaldo Carvalho de Melo <acme@redhat.com> AuthorDate: Fri, 26 Oct 2018 13:23:25 -0300 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Tue, 30 Oct 2018 11:46:23 -0300
perf trace: Beautify the umount's 'name' argument
By using the SCA_FILENAME beautifier, that works when either the probe:vfs_getname probe is in place or with the eBPF program tools/perf/examples/bpf/augmented_syscalls.c:
# perf probe -l probe:vfs_getname (on getname_flags:73@acme/git/linux/fs/namei.c with pathname) # perf trace -e umount 9630.332 ( 9.521 ms): umount/8082 umount2(name: /mnt) = 0 #
The augmented syscalls one will be done in the next patch.
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Benjamin Peterson <benjamin@python.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-hegbzlpd2nrn584l5jxn7sy2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/builtin-trace.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index db8711061ca3..d286f73ef2e5 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -838,7 +838,8 @@ static struct syscall_fmt { .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, { .name = "tkill", .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, - { .name = "umount2", .alias = "umount", }, + { .name = "umount2", .alias = "umount", + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, { .name = "uname", .alias = "newuname", }, { .name = "unlinkat", .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
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