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    SubjectRe: 2.6.21.14 NFS related oops
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    Date
    On Sat, 2007-06-16 at 11:26 +0200, Maciej Sołtysiak wrote:
    > >> =======================
    > >> Code: 10 89 5c 24 10 89 c3 89 7c 24 18 89 d7 89 74 24 14 8b 70 28 75 1a
    > >> 8b
    > >> 4e 08 89 fa 89 d8 ff 51 18 8b 5c 24 10 83 74 24 14 8b 7c 24 <18> 83 c4 1c
    > >> c3
    > >> 89 74 24 0c 8b 40 10 8b 40 24 8b 40 10 8b 40 08 EIP: [<f0a93c94>]
    > >> rpcauth_checkverf+0x34/0x70 [sunrpc] SS:ESP 0068:e64b5eec
    > >
    > > At a first guess, it looks as though something has scribbled over your
    > > credential. Have you tried running this kernel with slab debugging
    > > enabled?
    >
    > I'm running 2.6.21.5 now with slab debugging on, here's what I got about
    > slab corruption:
    >
    > Slab corruption: skbuff_head_cache start=ef287b78, len=164
    > Redzone: 0x5a2cf071/0x5a2cf071.
    > Last user: [<c031710c>](kfree_skbmem+0x3c/0x90)
    > 090: 6b 6b 6b 6b 6b 63 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
    > Single bit error detected. Probably bad RAM.
    > Run memtest86+ or a similar memory test tool.
    > Prev obj: start=ef287ac8, len=164
    > Redzone: 0x170fc2a5/0x170fc2a5.
    > Last user: [<c031798b>](__alloc_skb+0x2b/0x100)
    > 000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    > 010: 00 00 00 00 e0 71 e6 ef 00 00 00 00 00 00 00 00
    > Next obj: start=ef287c28, len=164
    > Redzone: 0x170fc2a5/0x170fc2a5.
    > Last user: [<c031798b>](__alloc_skb+0x2b/0x100)
    > 000: 84 d0 85 c5 84 d0 85 c5 04 d0 85 c5 2c 0a 73 46
    > 010: 6f cd 09 00 00 00 00 00 01 00 00 00 08 e5 72 ee
    >
    > How probable is that it is really a bad memory issue?
    > Does this report say anything about which RAM chip I should
    > investigate/replace ? I have 1x512MB+1x256MB
    >
    > Best Regards,
    > Maciej

    I'd try doing as suggested above: run memtest86 on the computer for a
    couple of hours and see what it tells you. That should hopefully give
    you enough information to figure out which chips need replacing.

    Cheers
    Trond

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