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    SubjectRe: File system cache corruption in 2.6?
    On Mon, Jan 05 2004, Nathaniel W. Filardo wrote:
    > Hi all,
    > I'm trying to work out the cause of a series of issues I've seen
    > on my 2.6 machine. It appears as though files (specifically libraries) in
    > memory can get corrupted, resulting in strangeness like segfaults and
    > things like "relocation error: can't find symbol ...-VOMD-POINTER" instead
    > of "...-VOID-POINTER".

    That's a single bit error.

    > I don't believe it's actual hardware failure for a few reasons: memtest86
    > passes all tests, GCC doesn't crash (it's a Gentoo system, so gcc and I
    > are well acquainted - and before I get jumped on, I've installed udev ;)
    > ), and most importantly, sometimes thrashing the file system or engaging a
    > kernel compile will rectify the situation, as just happened with emacs.
    > It crashed, I killed it, it wouldn't load - I started a kernel compile,
    > waited a bit, and lo', it works again. No messages of relevance appear in
    > dmesg.

    It looks _extremely_ much like bad memory, or bad hardware. Sometimes
    memtest just doesn't catch all errors (how long did you run it? needs
    several days often).

    --
    Jens Axboe

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