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    Subjectoops, 2.6.15.4 + qla1280+md+xfs+quota
    I have a 2.6.15.4 system that was running fine.  Internal drives are using 
    the Fusion MPT driver. I have two external JBODs with 12 disks each.
    Each JBOD has two channels, 6 disks per channel, and each channel is
    connected to a QLogic ISP 10160 controller.

    Each of the JBODs is built as an md raid5 (md1 and md2). Both raid5s are
    mirrored (md3). I had an ext3 filesystem running fine.

    I unmounted md3, ran "mkfs.xfs /dev/md3 && mount /dev/md3" and the system
    hung. md is built in, qla1280 and xfs are both modules. mount options in
    fstab are rw, quota, noatime -- possibly also noexec and nosuid, but I
    don't think they were enabled. XFS is built with XFS quota support; I've
    tried also with and without generic quota support. 4K stacks are enabled,
    if that matters. Full .config and dmesg output are at
    http://hashbrown.cts.ucla.edu/pub/oops-200602/ (config is with generic
    quota, dmesg has xfs loaded as a module and /dev/md3 mounted without quota
    set).

    I added "defaults" and removed "quota" from fstab for /dev/md3 and
    was able to mount the partition normally.

    It's not responsive to sysrq on the serial console. The last output
    (without generic quota) was:

    XFS mounting filesystem md3
    XFS quotacheck md3: Please wait.
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    c0114f5a
    *pde = 00000000
    Oops: 0000 [#1]
    SMP
    Modules linked in: xfs e1000 bonding qla1280 st
    CPU: 0
    EIP: 0060:[<c0114f5a>] Not tainted VLI
    EFLAGS: 00010006 (2.6.15.4)
    EIP is at do_page_fault+0x93/0x545
    eax: eb7ac000 ebx: 00000001 ecx: 0000007b edx: 00100100
    esi: 000001ff edi: c0114ec7 ebp: eb7ac0e8 esp: eb7ac094
    ds: 007b es: 007b ss: 0068
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel NULL pointer dereference at virtual address
    00000078
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address bebaee76
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address bebaee76
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:
    Unable to handle kernel paging request at virtual address 00100178
    printing eip:


    As soon as I mount the partition with quota in fstab, the machine hangs.
    The oops is not always the same. During one test run, I saw a number of
    "BUG: soft lockup detected on CPU#0" errors. The above oops is the only
    one I managed to capture.



    -Chris
    -
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