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authorJan Kara <jack@suse.cz>2020-05-13 18:02:23 +0200
committerJens Axboe <axboe@kernel.dk>2020-05-16 14:29:39 -0600
commit870c153cf0e6df1b8b5226af41b19945e8e0d143 (patch)
treede3133875aaf9e9c2caea0ee06de59aae0c17425
parent2771cefeac499d68ca2fca3861ba9e46d15bd4ae (diff)
downloadlinux-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.c4
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);
}