Re: [PATCH V3 6/6] blk-mq: support concurrent queue quiesce/unquiesce
From: Christoph Hellwig <hch@lst.de>
Date: 2021-10-12 15:08:36
Also in:
linux-nvme
On Tue, Oct 12, 2021 at 11:06:51PM +0800, Ming Lei wrote:
quoted
We can get rid of the QUEUE_FLAG_QUIESCED flag now and just look at ->quiesce_depth directly.I'd rather not to do that given we need to check QUEUE_FLAG_QUIESCED in fast path.
Checking an integer vs checking a bit is easier actually faster or at least the same speed depending on the architecture / micro architecture.