[PATCH 4/6] cxlflash: Improve EEH recovery time

Uma Krishnan ukrishn at linux.vnet.ibm.com
Sat Sep 10 08:14:09 AEST 2016


On 9/2/2016 3:40 PM, Uma Krishnan wrote:
> From: "Matthew R. Ochs" <mrochs at linux.vnet.ibm.com>
>
> When an EEH occurs during device initialization, the port timeout
> logic can cause excessive delays as MMIO reads will fail. Depending
> on where they are experienced, these delays can lead to a prolonged
> reset, causing an unnecessary triggering of other timeout logic in
> the SCSI stack or user applications.
>
> To expedite recovery, the port timeout logic is updated to decay the
> timeout at a much faster rate when in the presence of a likely EEH
> frozen event.
>
> Signed-off-by: Matthew R. Ochs <mrochs at linux.vnet.ibm.com>

Acked-by: Uma Krishnan <ukrishn at linux.vnet.ibm.com>



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