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    SubjectRe: All filesystems hang under long periods of heavy load (read and write) on a filesystem
    On Mon, 03 Nov 2003 15:46:22 -0800 Shirley Shi <> wrote:

    | Can anyone know why all filesystems hang under periods of heavy load on
    | one of the filesystem? Once the filesystems hang, any command related to
    | the filesystem, like 'ls', 'cat',etc., will stick forever until re-power
    | cycling the machine.
    | I kept running the following script to read and write the data on a same
    | filesystem(ext2 or XFS) since we need do some tests for the storage. Is
    | half day, onn the beginning, the system was running well. But after
    | running the script for a long time, such a half day, one day or two
    | days, all filesystems would get hung, including the root filesystem
    | although I didn't do any heavy load on it. The file(M.1) I used for
    | reading and writing is about 2.5GB.
    | @ total = 115
    | while (1)
    | @ cc = 2
    | while ($cc <= $total)
    | dd bs=512k if=/data/M.1 of=/data/M.$cc
    | echo "copying $cc of $total..."
    | @ cc = $cc + 1
    | end
    | rm -f /data/M.*
    | end
    | I tried RH8.0 with kernel 2.4.18 and kernel 2.4.21 with XFS and patch
    | rmap15j. I have the same issue running with the two kernels. Basically I
    | have two filesytems configured. One for the root configured with ext3,
    | and another is for the data configured with ext2 or XFS. With either
    | ext2 or XFS, I have the same problem.

    Can you try a recent kernel, like 2.4.23-pre8 or -pre9?

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