spin lock panic in 5.2-REL
jhb at FreeBSD.org
Tue Jan 27 12:16:32 PST 2004
On Tuesday 27 January 2004 03:47 am, Peter Losher wrote:
> So, the quad-Xeon box serving half of ftp.freebsd.org was upgraded to
> 5.2-RELEASE Sunday night, and a couple of hours ago it broke to gdb w/ a
> spin lock panic.
> spin lock sched lock held by 0x8d2f7a00 for > 5 seconds
> panic: spin lock held too long
> cpuid = 4;
> Stopped at Debugger+0x55: xchgl %ebx,in_Debugger.0
> db> [tail-]
> We had this issue after updating to 5.1-REL, one of our techs caught this
> and reset the box to bring it back online, so I don't have any additional
> info. I am not sure if this is a revisit of those same problems, or if
> it's something new.
This is a very hard to debug problem. If WITNESS is on it provides more
useful information that can help track that down, but I wouldn't expect a
production machine to be using WITNESS.
John Baldwin <jhb at FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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