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    SubjectRe: Fake ext3 corruption on raid5 in 2.6.11.9 smp
    First, I just realized the typo in my previous message's subject:
    Should read 2.6.*11.*9 smp, instead of 2.6_.9. Sorry :|

    jpearson wrote:
    > Hi,
    >
    > I saw this exact same error (EXT3-fs error (device dm-x): ext3_readdir:
    > bad entry in directory #nnnnnnn: rec_len % 4 != 0 - offset=0, inode=xxxxxxxx,
    > rec_len=...
    >
    > from time to time in my non-SMP RAID system with 512Mb RAM, with ext3 on LVM on top of RAID5.
    >
    > Never caused actual corruption - run FSCK, no errors, remount rw
    > successfully until next time; error rarely in the same place, but always
    > in a directory and rec_len % 4 != 0. Looks like an 'in-kernel' thing,
    > because (e.g.) running find on the volume after remounting rw produced
    > no issues, so presumably the on-disk directory wasn't *really* the
    > issue.

    I confirm this here too: random place, always a dir, always 'rec_len % 4
    != 0', no fs issue or data loss (so far...)

    > Filesystems between about 8 and 50 Gb, and not what I'd characterise as a
    > heavy load.

    By heavy load, I mean a system load between 10 and 15 for 3 hours
    (before error) Processes running were several instances of mkisofs
    (reading from and writing to the faulty partition)

    > This was with about 2.6.4 - 2.6.7. I'm running 2.6.11 now and haven't
    > seen it in some time; so it was either fixed by 2.6.11, or mounting ro
    > by default has just reduced my exposure.

    As my kernel is a 2.6.11.9, It is not fixed so far.

    I will reformat when possible, this time I will use lvm over raid5, so I
    can use xfs for my usefull data, and keep a medium ext3 partition to
    make tests if needed (just need to know what to test)

    Thanks
    -
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