diff options
| author | Jan Kara <jack@suse.cz> | 2020-05-13 18:02:23 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-16 14:29:39 -0600 |
| commit | 870c153cf0e6df1b8b5226af41b19945e8e0d143 (patch) | |
| tree | de3133875aaf9e9c2caea0ee06de59aae0c17425 | |
| parent | 2771cefeac499d68ca2fca3861ba9e46d15bd4ae (diff) | |
| download | linux-870c153cf0e6df1b8b5226af41b19945e8e0d143.tar.bz2 | |
blktrace: Report pid with note messages
Currently informational messages within block trace do not have PID
information of the process reporting the message included. With BFQ it
is sometimes useful to have the information and there's no good reason
to omit the information from the trace. So just fill in pid information
when generating note message.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | kernel/trace/blktrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index ca39dc3230cb..ea47f2084087 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -170,10 +170,10 @@ void __trace_note_message(struct blk_trace *bt, struct blkcg *blkcg, if (!(blk_tracer_flags.val & TRACE_BLK_OPT_CGROUP)) blkcg = NULL; #ifdef CONFIG_BLK_CGROUP - trace_note(bt, 0, BLK_TN_MESSAGE, buf, n, + trace_note(bt, current->pid, BLK_TN_MESSAGE, buf, n, blkcg ? cgroup_id(blkcg->css.cgroup) : 1); #else - trace_note(bt, 0, BLK_TN_MESSAGE, buf, n, 0); + trace_note(bt, current->pid, BLK_TN_MESSAGE, buf, n, 0); #endif local_irq_restore(flags); } |