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authorBart Van Assche <bart.vanassche@sandisk.com>2017-06-01 18:55:10 +0300
committerJens Axboe <axboe@fb.com>2017-06-01 22:02:56 +0300
commitc0cb1c6d39060ce04470b10347b7b6f1df77bef5 (patch)
treef48a010248393050aafc2f366ce6b1b2585409f5 /block/blk-mq-debugfs.c
parent03ea8ad78cfb2910862c8dfcd2a627fc04097db2 (diff)
downloadlinux-c0cb1c6d39060ce04470b10347b7b6f1df77bef5.tar.xz
blk-mq-debugfs: Show atomic request flags
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> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Eduardo Valentin <eduval@amazon.com> Cc: Omar Sandoval <osandov@fb.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-debugfs.c')
-rw-r--r--block/blk-mq-debugfs.c10
1 files changed, 10 insertions, 0 deletions
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)