2.5.70-bk10 oops when trying to mount root from raid-1 device

2.5.70-bk10 has some raid fixes, but raid-1 still fails unlike 2.5.70-mm4.

bk10 successfully discovers raid-1 and raid-0 arrays, but this happens when the kernel tries to mount root:

<lots of ordinary boot messages>
md ... autorun DONE
<this is where I normally get VFS: Mounted root (ext2 filesystem) readonly.
I got this instead:>
unable to handle kernel paging request at 5a5a5a86
EIP at put_all_bios+0x047/0x80
process swapper
raid_end_bio_io
deadline_next_request
raid1_end_request
scsi_request_fn
bio_endio
__end_that_request_first
scsi_end_request
scsi_io_completion
sd_rw_intr
scsi_finish_command
scsi_softirq
do_softirq
do_IRQ
default_idle
common_interrupt
default_idle
default_idle
cpu_idle
rest_init
start_kernel
unknown_bootoption
<0> kernel panic, exception in interrupt

This is a dual celeron with two scsi disks, with
two raid-1 arrays and one raid-0. The
kernel is compiled with preempt and devfs,
using gcc-3.3

Helge Hafting

This is "use of uninitialised memory". 0x6b6b6b6b is "use of freed memory".

It's supposed to be that way in Linus's tree too, but I screwed it up.

I'd be suspecting that the write_bios[] array isn't being memset somewhere.

                struct bio **bio = r1_bio->write_bios + i;