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SubjectRe: devfs breakage in 2.4.0 release
	On my Sony PictureBook PCG-C1VN, 2.4.0 hangs in the boot
process while 2.4.0-prerelease boots just fine. At first I thought
the problem was devfs-related, but skipping devfsd just caused the
hang to occur a little later, this time in ifconfig. The kernel
call trace looked something like this:

neigh_ifdown
sys_ioctl
sock_ioctl
[some addresses in modules]
stext_lock
__down_failed
__down

What surprised me more was that attempting to remount the
root filesystem for writing just before this (to record the module
kernel symbols) caused a kenel BUG() in slab.c:1542 becuase kmalloc
was being called with a huge negative number.

I know I could run ksymoops to get this trace, but I now
think the cause of the problem probably happens much earlier than
the symptoms. So, I trying backing out different 2.4.0 changes.
So far, I can tell you that reverting the linux/mm subdirectory to
its 2.4.0-prerelease contents had no effect. I will let you know
if I diagnose or fix the problem, as I think you may be experiencing
the same problem.

Adam J. Richter __ ______________ 4880 Stevens Creek Blvd, Suite 104
adam@yggdrasil.com \ / San Jose, California 95129-1034
+1 408 261-6630 | g g d r a s i l United States of America
fax +1 408 261-6631 "Free Software For The Rest Of Us."
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