Helge Hafting [off-list ref] wrote:

mm7 crashed where mm2 works.
The machine is a dual celeron with two scsi disks with
some raid-1 & raid-0 partitions.

deadline or anicipatory scheduler does not make a difference.
It dies anyway, attempting to kill init.

Here's what I managed to  write down before the 30 second reboot
kicked in:

EIP is at md_wakeup_thread

stack:
do_md_run
autorun_array
autorun_devices
autostart_arrays
md_ioctl
dentry_open
kmem_cache_free
blkdev_ioctl
sys_ioctl
init
init

This happened during the boot process. The kernel is compiled
with gcc 2.95.4 from debian testing. The machine uses devfs

A lot of md updates went into Linus's tree overnight.  Can you get some more
details for Neil?

Here is a wild guess:

diff -puN drivers/md/md.c~a drivers/md/md.c

--- 25/drivers/md/md.c~a	2003-03-15 12:02:04.000000000 -0800
+++ 25-akpm/drivers/md/md.c	2003-03-15 12:02:14.000000000 -0800

@@ -2818,6 +2818,8 @@ int md_thread(void * arg)
 
 void md_wakeup_thread(mdk_thread_t *thread)
 {
+	if (!thread)
+		return;
 	dprintk("md: waking up MD thread %p.\n", thread);
 	set_bit(THREAD_WAKEUP, &thread->flags);
 	wake_up(&thread->wqueue);

_

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