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authorJens Axboe <axboe@kernel.dk>2013-11-19 09:25:07 -0700
committerJens Axboe <axboe@kernel.dk>2013-11-19 09:25:07 -0700
commit94eddfbeaafa3e8040a2c47d370dea0e58e76941 (patch)
tree52cdf7a26b27d9cab3b1eba9b424a6d1432bdf8d /include
parent34f2fd8dfe6185b0eaaf7d661281713a6170b077 (diff)
downloadlinux-94eddfbeaafa3e8040a2c47d370dea0e58e76941.tar.bz2
blk-mq: ensure that we set REQ_IO_STAT so diskstats work
If disk stats are enabled on the queue, a request needs to be marked with REQ_IO_STAT for accounting to be active on that request. This fixes an issue with virtio-blk not showing up in /proc/diskstats after the conversion to blk-mq. Add QUEUE_FLAG_MQ_DEFAULT, setting stats and same cpu-group completion on by default. Reported-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blkdev.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f26ec20f6354..1b135d49b279 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -505,6 +505,9 @@ struct request_queue {
(1 << QUEUE_FLAG_SAME_COMP) | \
(1 << QUEUE_FLAG_ADD_RANDOM))
+#define QUEUE_FLAG_MQ_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
+ (1 << QUEUE_FLAG_SAME_COMP))
+
static inline void queue_lockdep_assert_held(struct request_queue *q)
{
if (q->queue_lock)