Re: [PATCH] delay transition requeues for 2 seconds - alua

[Rob Evers <revers@redhat.com>]

On 01/03/2012 02:20 PM, Rob Evers wrote:
> From: Rob Evers<revers@redhat.com>
>
> When alua targets are transitioning, the scsi midlayer retry mechanism
> continuously retries the scsi commands that are returning with not ready
> transitioning status.  The target is not capable of handling the
> commands for time on the order of several seconds during these transistions.
>
> This patch delays the device queue for 2 seconds, which is in the same
> order of aas transition time.
>
> Also, handle all other cases where ADD_TO_MLQUEUE_DELAY could be returned
> instead of ADD_TO_MLQUEUE as if ADD_TO_MLQUEUE were being returned.
>
> Problem found by array partner testing
>
> change MLQUEUE_DEV_DLY_RTY to MLQUEUE_DELAYED_RETRY

Hi James,

I noticed this didn't get included yet.

If you are planning to include this, please hold off.
I misunderstood the testing status initially and we
need to collect more information.  It may take some
time.

Rob