Re: [PATCH 14/14] block: add special APIs for run-time disabling of discard and friends

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On 31/05/2024 08:48, Christoph Hellwig wrote:
A few drivers optimistically try to support discard, write zeroes and
secure erase and disable the features from the I/O completion handler
if the hardware can't support them.  This disable can't be done using
the atomic queue limits API because the I/O completion handlers can't
take sleeping locks or freeze the queue.  Keep the existing clearing
of the relevant field to zero, but replace the old blk_queue_max_*
APIs with new disable APIs that force the value to 0.

Signed-off-by: Christoph Hellwig<hch@xxxxxx>
Reviewed-by: Bart Van Assche<bvanassche@xxxxxxx>
Reviewed-by: Damien Le Moal<dlemoal@xxxxxxxxxx>


Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>




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