[PATCH 2/5] blk-mq-debugfs: Show atomic request flags

Bart Van Assche
2017-05-25T23:38:07Z

When analyzing e.g. queue lockups it is important to know whether
or not a request has already been started. Hence also show the
atomic request flags.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Ming Lei <ming.lei@redhat.com>
---
block/blk-mq-debugfs.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 803aed4d7221..d56ddd7a1285 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -267,6 +267,14 @@ static const char *const rqf_name[] = {
};
#undef RQF_NAME

+#define RQAF_NAME(name) [REQ_ATOM_##name] = #name
+static const char *const rqaf_name[] = {
+ RQAF_NAME(COMPLETE),
+ RQAF_NAME(STARTED),
+ RQAF_NAME(POLL_SLEPT),
+};
+#undef RQAF_NAME
+
int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq)
{
const struct blk_mq_ops *const mq_ops = rq->q->mq_ops;
@@ -283,6 +291,8 @@ int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq)
seq_puts(m, ", .rq_flags=");
blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name,
ARRAY_SIZE(rqf_name));
+ seq_puts(m, ", .atomic_flags=");
+ blk_flags_show(m, rq->atomic_flags, rqaf_name, ARRAY_SIZE(rqaf_name));
seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag,
rq->internal_tag);
if (mq_ops->show_rq)
--
2.12.2