linux-kernel - Re: [PATCH] virtio_scsi: let host do exception handling

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Date:   Mon, 26 Jun 2017 13:11:27 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Douglas Miller <dougmill@...ux.vnet.ibm.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Hannes Reinecke <hare@...e.de>, linux-scsi@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] virtio_scsi: let host do exception handling


Paolo,

> virtio_scsi tries to do exception handling after the default 30
> seconds timeout expires.  However, it's better to let the host control
> the timeout, otherwise with a heavy I/O load it is likely that an
> abort will also timeout.  This leads to fatal errors like filesystems
> going offline.
>
> Disable the 'sd' timeout and allow the host to do exception handling,
> following the precedent of the storvsc driver.

Applied to 4.13/scsi-queue. Thank you!

-- 
Martin K. Petersen	Oracle Linux Engineering