[PATCH v3 30/30] block: Do not special-case plugging of zone write operations

[Damien Le Moal]

On 3/28/24 15:51, Christoph Hellwig wrote:
> On Thu, Mar 28, 2024 at 03:43:02PM +0900, Damien Le Moal wrote:
>> That is indeed not great, but irrelevant for zone writes as the regular BIO plug
>> is after the zone write plugging. So the regular BIO plug can only see at most
>> one write request per zone. Even if that order changes, that will not result in
>> unaligned write errors like before. But the reordering may still be bad for
>> performance though, especially on HDD, so yes, we should definitely look into this.
> 
> Irrelevant is not how I would frame it.  Yes, it will not affect
> correctness.  But it will affect performance not just for the write
> itself, but also in the long run as it affects the on-disk extent
> layout.

Agreed.

-- 
Damien Le Moal
Western Digital Research