nfs (xfs) problem in 2.4.x kernel

From: F. Baker (baker_at_deslab.mit.edu)
Date: 03/29/04

  • Next message: Jeff Graves: "Winbind/Smb Authentication" 
    Date: Mon, 29 Mar 2004 15:34:43 -0500
To: redhat-list@redhat.com

    We have several Linux x86 workstations here. In "dmesg" on
    these PCs I see a lot of errors that read:

    NFS: Server wrote less than requested.

     AND

    eth0: TX underrun, threshold adjusted.

    This message appears whenever someone logged into the
    Mandrake/RH/whatever box (with NFS autofs mounting in his/her home
    directory) tries to write something to an nfs-mounted directory
    (usually the home directory). Even small files of 1.5 MB or so often
    generate something such as "I/O error" when saving a file (really
    small files usually get saved fine). And the home directory is always
    based in an SGI (O2, Indy, Onyx) with xfs file system.

    Intra-SGI these transfer take place perfectly, but
    Mandrake/RH/OtherLinux generates these problems.

    Has anyone seen this error before and does anyone know how
    to get around it? The kernel used is 2.4.22-28 for most
    of the Mandrake boxes, or at least 2.4.x anyway. We have not
    gone to 2.6.x yet.

    Thanks in advance.

    baker@deslab.mit.edu

    PS: Interestingly, when writing a big file, via e.g.,
            cp file1 file2

    The command always fails the first time. Try a second time
    and it works. Even if you delete the partially-written
    file2 and execute the command again, it works. Very strange. 

    -- 
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