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    SubjectRe: PROBLEM: null pointer dereference in cfq_dispatch_requests (2.6.21-rc2 and 2.6.20)
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    On Wed, 2007-03-21 at 20:59 +0100, Jens Axboe wrote:
    > On Wed, Mar 21 2007, Dale Blount wrote:
    > > On Wed, 2007-03-21 at 14:09 -0400, Chuck Ebbert wrote:
    > > > Dale Blount wrote:
    > > > >> I'm puzzled why this is hitting Dan, but no one else has reported
    > > > >> anything. Dan, did 2.6.19 work for you?
    > > > >
    > > > > Actually, I believe it is happening to me too. This is on a 4-disk raid5 with
    > > > > one failed disk on two 2-port sata_sil pci controller cards.
    > > > >
    > > > > The BUG below is from 2.6.20.3, but I will try 2.6.21-rc4 tonight.
    > > > > The disk didn't fail until 2.6.20, so I don't know if 2.6.19 would have worked
    > > > > or not.
    > > > >
    > > > >
    > > >
    > > > Just to be clear: you have a RAID array (what level?) with a failed disk
    > > > and it's giving you the same error that Dan gets?
    > >
    > >
    > > Yes, the BUG looks to be pretty similar to me. It's a 4 disk raid5 with
    > > one disk missing (dead and sent in for RMA).
    >
    > Interesting, I'll definitely see if I can reproduce it like that.
    >

    FWIW, the server made it through a round using 2.6.21-rc4 without
    errors. 2.6.20.x failed 5 times straight and worked 4 times prior to
    that (also with a missing disk), so it could be a coincidence too.

    The disk is back from RMA, do you need me to hold off replacing it?

    Thanks,

    Dale

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