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Date: Wed, 25 Jul 2018 14:33:14 -0700
From: Omar Sandoval <osandov@osandov.com>
To: Ming Lei <ming.lei@redhat.com>
Cc: Omar Sandoval <osandov@fb.com>, Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org
Subject: Re: [PATCH] block/023: performance test on queue creation & cleanup
Message-ID: <20180725213314.GD16847@vader>
References: <20180704052956.5110-1-ming.lei@redhat.com>
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On Wed, Jul 04, 2018 at 01:29:56PM +0800, Ming Lei wrote:
> SCSI may have lots of channels, targets or LUNs, so it may
> take long time for creating and cleaning up queues.
> 
> So introduce block/023 and uses null_blk to run this test
> on both blk-mq and legacy mode, then compare both and check
> the difference.
> 
> Signed-off-by: Ming Lei <ming.lei@redhat.com>
> ---
>  tests/block/023     | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/block/023.out |   2 ++
>  2 files changed, 103 insertions(+)
>  create mode 100755 tests/block/023
>  create mode 100755 tests/block/023.out

Hi, Ming, is this a regression test for "blk-mq: remove
synchronize_rcu() from blk_mq_del_queue_tag_set()" and "blk-mq: avoid to
synchronize rcu inside blk_cleanup_queue()"?