Re: [Tipc-discussion] Possible spin lock deadlock

[Mark H. <ma...@os...>]

On Mon, 2004-06-07 at 09:58, Mark Haverkamp wrote:
> I have code running on 4 nodes using multicast to distribute messages
> between the nodes.  After some hours of sending/and receiving one or
> more of my nodes will hang.  The last time 3 of 4 machines were hung and
> I was able to get a dump from one of them.  This one seems to indicate
> that there may be a spin lock deadlock in buf_safe_discard.  It shows up
> twice in this stack dump.  It looks like the first buf_safe_discard gets
> interrupted while holding the lock.  The second buf_safe_discard seems
> to be called from link_recv_proto_msg (the address pointed to in
> tipc_recv_msg is just after the call to link_recv_proto_msg.

After talking with Daniel, this is probably  not a dead lock.  Since the
spin_lock_bh stops the softirqs.  Anyway, I'll try to put in some debug
code in the buf_safe_discard/buf_discard functions to try to narrow it
down.

Mark.

-- 
Mark Haverkamp <ma...@os...>