tree 76674bd5ec6033d3c0cba90437c437b1938f4a4a
parent 87a9d1cc2e8f0a442ed1f219d36446398c5e24df
author Ilya Dryomov <idryomov@gmail.com> 1537965350 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1539415642 +0200

blk-mq: I/O and timer unplugs are inverted in blktrace

commit 587562d0c7cd6861f4f90a2eb811cccb1a376f5f upstream.

trace_block_unplug() takes true for explicit unplugs and false for
implicit unplugs.  schedule() unplugs are implicit and should be
reported as timer unplugs.  While correct in the legacy code, this has
been inverted in blk-mq since 4.11.

Cc: stable@vger.kernel.org
Fixes: bd166ef183c2 ("blk-mq-sched: add framework for MQ capable IO schedulers")
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>