On Thu, 5 Aug 2021 01:14:12 +0300, Shai Malin wrote:
> Driver fastpath employs doorbells to indicate to the device that work
> is available. Each doorbell translates to a message sent to the device
> over the pci. These messages are queued by the doorbell queue HW block,
> and handled by the HW.
> If a sufficient amount of CPU cores are sending messages at a sufficient
> rate, the queue can overflow, and messages can be dropped. There are
> many entities in the driver which can send doorbell messages.
> When overflow happens, a fatal HW attention is indicated, and the
> Doorbell HW block stops accepting new doorbell messages until recovery
> procedure is done.
>
> [...]
Applied to 5.15/scsi-queue, thanks!
[1/1] scsi: qedi: Add support for fastpath doorvell recovery
https://git.kernel.org/mkp/scsi/c/9757f8af0442
--
Martin K. Petersen Oracle Linux Engineering
