Re: 2.6.17-mm5

[Neil Brown]

On Saturday July 1, James.Bottomley@xxxxxxxxxxxx wrote:
> On Sat, 2006-07-01 at 14:30 -0700, Andrew Morton wrote:
> > On Sat, 1 Jul 2006 15:24:19 +0100
> > Grant Wilson <grant.wilson@xxxxxxxxx> wrote:
> > 
> > > More RAID1 problems - OOPS on shutdown.
> 
> Actually, is there any more of the trace, like what was going on just
> before the oops?
> 
> It looks very like a lifetime issue (i.e. md thinks the array is dead
> and has torn it down, but there's still an outstanding command).  It
> would be nice to know what the outstanding command might have been.

md writes the superblock after tearing down the array, which is
admittedly a bit careless.

The problem seems to be simply that on some hardware at least,
BIO_RW_BARRIER writes result in an EIO.  Don't know why yet.

NeilBrown
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