Re: [PATCH 4/8] block/mq-deadline: Only use zone locking if necessary

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On 1/9/23 16:41, Jens Axboe wrote:
Or, probably better, a stacked scheduler where the bottom one can be zone
away. Then we can get rid of littering the entire stack and IO schedulers
with silly blk_queue_pipeline_zoned_writes() or blk_is_zoned_write() etc.

Hi Jens,

Isn't one of Damien's viewpoints that an I/O scheduler should not do the reordering of write requests since reordering of write requests may involve waiting for write requests, write request that will never be received if all tags have been allocated?

Thanks,

Bart.



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