Date: Thu, 12 Aug 2004 10:37:12 -0400 (EDT) From: Robert Watson <rwatson@freebsd.org> To: Martin Blapp <mb@imp.ch> Cc: freebsd-current@freebsd.org Subject: Re: SCHEDULE and high load situations Message-ID: <Pine.NEB.3.96L.1040812103402.38103F-100000@fledge.watson.org> In-Reply-To: <20040812151731.T31181@cvs.imp.ch>
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On Thu, 12 Aug 2004, Martin Blapp wrote: > With the lastest ULE changes, the stress test doesn't run 30 seconds > till FreeBSD crashes. Since the machine is spare, I'm still connected to > it. I can give you access if you like. Note that this is a new panic > message. > > Fatal trap 12: page fault while in kernel mode > cpuid = 1; apic id = 01 > fault virtual address = 0x14 > fault code = supervisor write, page not present > instruction pointer = 0x8:0xc066a1c7 > stack pointer = 0x10:0xe2626aa8 > frame pointer = 0x10:0xe2626ab8 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 27897 (mimedefang) Looks like a NULL pointer dereference. Are you running with debug.mpsafenet=1 or the default? > x/x 0xc066a1c7 > unp_connect2+0x2a: f144b89 > > db> where > unp_connect2(c4bb78a4,c39cc13c,0,0,0) at unp_connect2+0x2a > unp_connect(c4bb78a4,c43d9380,c4dee9a0,c43d9380,80) at unp_connect+0x3d5 > uipc_connect(c4bb78a4,c43d9380,c4dee9a0) at uipc_connect+0x76 > soconnect(c4bb78a4,c43d9380,c4dee9a0,0,bf1dad88) at soconnect+0x54 > kern_connect(c4dee9a0,3,c43d9380,c43d9380,c3e958ac) at kern_connect+0xb0 > connect(c4dee9a0,e2626d14,c,c4dee9a0,e2626d3c) at connect+0x42 > syscall(2f,2f,2f,bf1dad88,bf1dad8a) at syscall+0x300 > Xint0x80_syscall() at Xint0x80_syscall+0x1f > --- syscall (98, FreeBSD ELF32, connect), eip = 0x28101d23, esp = 0xbf1dad74, ebp = 0xbf1dae10 --- I'll need you to run gdb on a copy of your kernel with debugging symbols and convert the symbol+offsets into file and line numbers. When I compile a few local kernels, these offsets map to less than meaningful locations, so I'm probably building with somewhat different kernel options. Thanks! Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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