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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-10-26 13:51:45 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-10-30 11:46:23 -0300 |
| commit | 23c07a23cbed389d0b9c7a06486574621df8d1a4 (patch) | |
| tree | 85eb99fe20da0cb46509b8c51b9dde872227bd5e /tools | |
| parent | perf trace: Beautify the umount's 'name' argument (diff) | |
| download | linux-dev-23c07a23cbed389d0b9c7a06486574621df8d1a4.tar.xz linux-dev-23c07a23cbed389d0b9c7a06486574621df8d1a4.zip | |
perf trace: Beautify mount's first pathname arg
The pathname beautifiers so far support just one augmented pathname per
syscall, so do it just for mount's first arg, later this will get fixed.
With:
# perf probe -l
probe:vfs_getname (on getname_flags:73@acme/git/linux/fs/namei.c with pathname)
#
Later this will get added to augmented_syscalls.c (eBPF):
In one xterm:
# perf trace -e mount,umount
2687.331 ( 3.544 ms): mount/8892 mount(dev_name: /mnt, dir_name: 0x561f9ac184a0, type: 0x561f9ac1b170, flags: BIND) = 0
3912.126 ( 8.807 ms): umount/8895 umount2(name: /mnt) = 0
^C#
In the other:
$ sudo mount --bind /proc /mnt
$ sudo umount /mnt
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-qsvhrm2es635cl4zicqjeth2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-trace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index d286f73ef2e5..dc8a6c4986ce 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -727,7 +727,8 @@ static struct syscall_fmt { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, }, { .name = "mount", - .arg = { [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, + [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, { .name = "mprotect", .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, |