Re: [PATCH 00/13] scsi: Support LUN/target based error handle

[haowenchao (C)]

On 2023/8/15 23:48, Bart Van Assche wrote:
> On 8/15/23 07:17, haowenchao (C) wrote:
> > We can reduce probability of blocking whole host when handle error
> > commands with this patchset, which is important for servers which
> > deploy large scale disks. And the new error handler is not enabled
> > default, so it would not affect drivers which do not need it.
>
> Which drivers need this new error handler? I don't see any changes for
> SCSI drivers in this patch series other than scsi_debug. Has this patch
> series perhaps been developed for a pass-through driver between virtual
> machine guests and their host? If so, has it been considered to
> configure pass-through such that there is one disk per SCSI host instead
> of multiple?

I tested the error hander with our private hardware(the driver code was
not pushed in mainline), as discussed, megaraid_sas, mpt3sas, smartpqi,
hiraid and hisi_sas need this new error handler too, while hisi_sas
needs more steps to using it because it is tightly coupled with
libsas/libata. I want the basic frame to be reviewed first, so just
modify the scsi_debug, which is accessible for everyone and easy to
simulate various kind of error.

I do not know how pass-through driver between virtual machine guests
and their host work, do you mean virtio-scsi in guests OS?
Can you describe more?

Thanks.

> Thanks,
>
> Bart.