Re: [PATCH 04/16] md: add queue limit helpers

Christoph Hellwig <[email protected]>
Newsgroups dev.linux.lists.drbd-dev,dev.linux.lists.dm-devel,org.kernel.vger.linux-block,org.kernel.vger.linux-raid
Message-ID <[email protected]> 
On Mon, Feb 26, 2024 at 07:38:17PM +0800, Yu Kuai wrote:
> Any reason to use blk_mq_freeze/unfreeze_queue ? I don't think this is
> meaningful for raid, this only wait for IO submission, not IO done.
>
> raid should already handle concurrent IO with reshape, so I think this
> can just be removed.

We can't just change limits under the driver if I/Os are being sumitted.
That is one of the points of the whole queue limits exercises.
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