| commit | bc1d69d6151f1911ecb120a8dbd65e47210b7a72 | [log] [tgz] |
|---|---|---|
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | Thu Feb 21 11:49:27 2019 -0500 |
| committer | Theodore Ts'o <tytso@mit.edu> | Thu Feb 21 11:49:27 2019 -0500 |
| tree | 894a447e6f9669653f4668ab3f791534d6b5f460 | |
| parent | 231fe82b5609c5d679f81073739c6132aaf166ea [diff] |
ext4: add sysfs attr /sys/fs/ext4/<disk>/journal_task This is useful for moving journal thread into cgroup or for tracing it with ftrace/perf/blktrace. For now the only way is `pgrep jbd2/$DISK` but this is not reliable: name may be longer than "comm" limit and any task could mock it. Attribute shows pid in current pid-namespace or 0 if task is unreachable. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: Theodore Ts'o <tytso@mit.edu>