loop devices under SMP (2.1.106ac4)

Rick Payne (rickp@rossfell.co.uk)
Mon, 22 Jun 1998 22:40:08 +0100 (BST)

There appears to be a deadlock of some kind with loop devices under
2.1.106-ac4 and SMP. Executing the following command locks my system dead:

mount isoimage.raw -r -t iso9660 -o loop /mnt

Running a non-SMP kernel and the above works a treat. The problem was also
present in 2.1.106-ac3 and -ac2, but these are the only kernels I've tried
since getting the SMP box, so it may well have existed in previous kernels.

It looks like something is going awry inside ll_rw_block called from
loop.c's do_lo_request. A spinlock thing perhaps?

I'll continue looking at it, but if this rings any bells for anyone and
they get there before me, give me a shout.

Rick

-- 
Rick Payne, Senior Network Admin     | Meddle not in the affairs of
NETCOM Internet Ltd.                 | dragons - for you are crunchy &
rickp@corp.netcom.net.uk             | taste great dipped in chocolate.


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