Re: [PATCH v2 12/28] block: Allow BIO-based drivers to use blk_revalidate_disk_zones()

Hannes Reinecke
2024-03-27T07:29:59Z

On 3/25/24 05:44, Damien Le Moal wrote:
> In preparation for allowing BIO based device drivers to use zone write
> plugging and its zone append emulation, allow these drivers to call
> blk_revalidate_disk_zones() so that all zone resources necessary to zone
> write plugging can be initialized.
>
> To do so, remove the check in blk_revalidate_disk_zones() restricting
> the use of this function to mq request-based drivers to allow also
> BIO-based drivers to use it. This is safe to do as long as the
> BIO-based block device queue is already setup and usable, as it should,
> and can be safely frozen. The zone write plug hash table and
> conventional zone bitmap are allocated and initialized only for mq
> devices and for BIO-based devices that require zone append emulation.
>
> Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
> ---
> block/blk-zoned.c | 26 ++++++++++++++++++++------
> 1 file changed, 20 insertions(+), 6 deletions(-)
>
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
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