Re: [PATCH 1/2] scsi: core: Add support for reserved tags

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On 11/9/21 10:59 PM, Hannes Reinecke wrote:
This is essentially the same patch as I posted a while ago (cf https://lore.kernel.org/linux-scsi/20210222132405.91369-1- hare@xxxxxxx/).

But there had been push-back on that series as it would also try to use a scsi host device for driver-internal commands.

Maybe we should combine our efforts; patch 2 is equivalent to your patch, and 3-5 are a conversion of the fnic driver to use those commands. So we should merge our efforts to get this thing off the ground.

For the remainder of the patchset I'm currently working on a solution to address the upstream concerns.

Hi Hannes,

In the UFS driver we are using a request queue that is not associated with any SCSI device for allocating driver-internal tags from the same tags space as SCSI commands. Is this a solution that is generic enough to be re-used by other SCSI drivers? See also the output of git grep -nH 'hba->cmd_queue'.

Thanks,

Bart.



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