[OpenAFS-devel] oops on trying to unmount /afs [i386_linux24, SMP]

[Chas Williams]

>The best guess I have is that afsd tried to generate traffic and the afs
>module tries to process it while we're shutting down - perhaps something is
>not being done atomically?  I've never successfully unmounted AFS on this
>configuration, while I know that it works on 2.2 UP systems.

i saw this problem while debugging the linux 2.4 version of afs.
the sock_release() in LINUX/rx_knet.c is the 'culprit'.  the socket
is freed, but its looks like someone is still using it at the time.
i 'fixed' the problem by commenting sock_release() and printk'ing
a reminder.  perhaps a lock_kernel()/unlock_kernel() around the
sock_release()?

>>>EIP; c0123c4a <remove_wait_queue+6/24>   <=====
>Trace; c0216fd6 <wait_for_packet+e6/12c>
>Trace; c02170ec <skb_recv_datagram+d0/f0>
>Trace; c023b805 <udp_recvmsg+55/230>
>Trace; c0240ee0 <inet_recvmsg+58/70>
>Trace; c02137a1 <sock_recvmsg+3d/ac>
>Trace; ca958c7d <[openafs.mp]osi_NetReceive+bd/f8>