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@xxxxxxx> --- kernel/trace/blktrace.c | 4 ++-- 1 file 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); } -- 2.16.4
