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    SubjectRe: 2.6.0-test5-mm4 boot crash
    test5-mm4 crashed during RAID-1 autodetection and setup.
    It got as far as:
    md: created md0
    md: bind<hda1>
    md: bind<hdb1>
    md: running: <hdb1><hda1>

    After this, I usually get this (from test5-mm3 dmesg):
    raid1: raid set md0 active with 2 out of 2 mirrors
    md: ... autorun DONE.
    VFS: Mounted root (ext2 filesystem) readonly.

    Instead, I got the dump at the end of this message.
    I'm using devfs and Viro's compile fix for devfs in mm4.
    The root fs is on raid-1, the raid-1 gets autodetected.

    The kernel has no module support, and no initrd.

    Here's the dump:

    Unable to handle null pointer deref at virtual address 00000000
    eip c02b7d1e eip at md_probe
    PREEMPT process swapper pid:1
    Trace:
    invalidate_inode_pages
    do_md_run
    printk
    autorun_array
    autorun_devices
    mddev_put
    autostart_arrays
    igrab
    md_ioctl
    devfs_open
    dentry_open
    filp_open
    blkdev_ioctl
    sys_ioctl
    md_run_setup
    prepare_namespace
    init
    init
    kernel_thread_helper
    Attempted to kill init!

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