tree 52cdf7a26b27d9cab3b1eba9b424a6d1432bdf8d
parent 34f2fd8dfe6185b0eaaf7d661281713a6170b077
author Jens Axboe <axboe@kernel.dk> 1384878307 -0700
committer Jens Axboe <axboe@kernel.dk> 1384878307 -0700

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>