Re: Stack backtrace

I was reinstalling cvsup when the backtraces occurred. It caused a few but
it seems it keeps doing them after it was done installing. Iv'e attached my 
Verbose dmesg and a part of my message log with the errors.

Sorry it took so long to get back to you


> On Fri, 18 Jun 2004, Grover Lines wrote:
> 
> > I've been having some problems with cvsup corruption and haven't 
> > been able to trace it to the source so I decided to recompile my 
> > kernel with all GENERIC options and debugging to see if it was 
> > something that I had changed that caused the problem. I'm not sure 
> > what this means but it popped up during the build of cvsup.
> > 
> > Is this a possible source of my problem or is this something not to 
> > worry about?
> 
> This is unlikely to be the cause of the problem you're experiencing, 
> but it's also not something to be ignored.  Basically, we're grabbing 
> the inpcb lock over a potentially blocking memory allocation, which is 
> a Bad Thing (tm).  However, it's a non-trivial fix because it requires 
> some code plumbing.  I'll work up a patch and see what I can do, but 
> it sounds like you need to keep looking to find the problem that's 
> actually causing it.

Also, do you have any idea what application it was you used that triggered
this message?

> 
> Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
> robert_at_fledge.watson.org      Senior Research Scientist, McAfee Research
> 
> 
> > 
> > malloc(M_WAITOK) of "Mbuf", forcing M_NOWAIT with the following 
> > non-sleepable locks held:
> > exclusive sleep mutex inp (tcpinp) r = 0 (0xc1d17bd0) locked _at_
> > /usr/src/sys/netinet/tcp_usrreq.c:1037
> > Stack backtrace:
> > witness_warn(5,0,c08db91d,c08c1095,c08c5805) at witness_warn+0x194
> > uma_zalloc_arg(c1021b00,d6b19c0c,2,c066635e,0) at 
> > uma_zalloc_arg+0x50
> > ip_ctloutput(c284213c,d6b19cb8,c08ce5cb,40e,c1d17bd0) at 
> > ip_ctloutput+0x9b
> > tcp_ctloutput(c284213c,d6b19cb8,0,0,0) at tcp_ctloutput+0xad
> > sosetopt(c284213c,d6b19cb8,d6b19cb4,0,c284213c) at sosetopt+0x48
> > setsockopt(c1d4ddc0,d6b19d14,14,d6b19d48,5) at setsockopt+0xd4
> > syscall(2f,2f,2f,281a6920,3) at syscall+0x12f
> > Xint0x80_syscall() at Xint0x80_syscall+0x1f
> > --- syscall (105), eip = 0x28108fef, esp = 0xbfbfe91c, ebp = 
> > 0xbfbfe948 ---