Re: [PATCH v6 1/7] block: Introduce the flag QUEUE_FLAG_NO_ZONE_WRITE_LOCK

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On 8/4/23 9:47?AM, Bart Van Assche wrote:
> Writes in sequential write required zones must happen at the write
> pointer. Even if the submitter of the write commands (e.g. a filesystem)
> submits writes for sequential write required zones in order, the block
> layer or the storage controller may reorder these write commands.
> 
> The zone locking mechanism in the mq-deadline I/O scheduler serializes
> write commands for sequential zones. Some but not all storage controllers
> require this serialization. Introduce a new request queue flag to allow
> block drivers to indicate that they preserve the order of write commands
> and thus do not require serialization of writes per zone.

Looking at how this is used, why not call it QUEUE_FLAG_ZONE_WRITE_LOCK
instead? That'd make the code easier to immediately grok, rather than
deal with double negations.

-- 
Jens Axboe




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