Commit 870c153c authored by Jan Kara's avatar Jan Kara Committed by Jens Axboe
Browse files

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: default avatarJan Kara <jack@suse.cz>
Reviewed-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: default avatarPaolo Valente <paolo.valente@linaro.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 2771cefe

kernel/trace/blktrace.c

+2 −2
Original line number Diff line number Diff line
@@ -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);

}