Date: Fri, 18 Jun 2004 15:38:59 -0400 (EDT) From: Robert Watson <rwatson@freebsd.org> To: Grover Lines <grover@ceribus.net> Cc: freebsd-current@freebsd.org Subject: Re: Stack backtrace Message-ID: <Pine.NEB.3.96L.1040618153745.74811A-100000@fledge.watson.org> In-Reply-To: <20040618181945.C228143D2F@mx1.FreeBSD.org>
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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. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@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 @ > /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 --- > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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