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Re: easily reproducible filesystem crash on rebuilding array

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: easily reproducible filesystem crash on rebuilding array
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 15 Dec 2014 23:56:05 -0800
Cc: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20141215201036.GQ24183@dastard>
References: <20141211123936.1f3d713d@xxxxxxxxxxxxxxxxxxxx> <20141215130715.4dfaaa8e@xxxxxxxxxxxxxxxxxxxx> <20141215132500.13210fdb@xxxxxxxxxxxxxxxxxxxx> <20141215201036.GQ24183@dastard>
User-agent: Mutt/1.5.23 (2014-03-12)
On Tue, Dec 16, 2014 at 07:10:36AM +1100, Dave Chinner wrote:
> The controller is broken if it's returning EIO to reads when it
> is busy.

What controller is this?  SCSI devices can return a QUEUE BUSY
indicator, so having a RAID controller do something similar doesn't
sound unusual.  But the driver needs to returns translate that into
a QUEUE BUSY so that the SCSI midlayer can handle it correctly.

It might make sense to take this to linux-scsi with the driver
maintainer in Cc.

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