Date: Tue, 24 Aug 2004 00:20:24 -0400 (EDT) From: Robert Watson <rwatson@freebsd.org> To: andy@bradfieldprichard.com.au Cc: freebsd-current@freebsd.org Subject: Re: PLEASE TEST: IPI deadlock avoidance patch Message-ID: <Pine.NEB.3.96L.1040824001913.82518B-100000@fledge.watson.org> In-Reply-To: <53654.203.41.12.153.1093299636.squirrel@bpgate.speednet.com.au>
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On Tue, 24 Aug 2004 andy@bradfieldprichard.com.au wrote: > > > > Thanks to everybody for confirming the fix :-) > > -- > > With the patch applied, during a make -j4 buildworld my box still hangs > with the following (bright-white) messages on the console: > > <these messages are repeated on the screen until hang> > ... > panic: APIC: Previous IPI is stuck > cpuid = 0; > boot() called on cpu#0 > Uptime: 3h57m24s > Cannot dump. No dump device defined. > panic: malloc(M_WAITOK) in interrupt context > cpuid = 0; > KDB: enter: panic > <hangs here> Could you set the following sysctl: debug.kdb.stop_cpus=0 It's also a tunable in HEAD, but not yet RELENG_5, so you'll need to set it at run time. This will prevent KDB from trying to IPI the other CPUs to stop them while the current CPU is in KDB. However, during an IPI deadlock, this won't work. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research > > > :( > > > Some dmesg info: > > <snip> > FreeBSD 5.3-BETA1 #0: Mon Aug 23 23:46:21 EST 2004 > root@hummer:/slim/obj/hummer/src-current/src/sys/GENERIC > WARNING: WITNESS option enabled, expect reduced performance. > Timecounter "i8254" frequency 1193182 Hz quality 0 > CPU: Pentium Pro (198.95-MHz 686-class CPU) > Origin = "GenuineIntel" Id = 0x619 Stepping = 9 > Features=0xfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV> > real memory = 536870912 (512 MB) > avail memory = 515706880 (491 MB) > MPTable: <INTEL ALDER > > FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs > cpu0 (BSP): APIC ID: 0 > cpu1 (AP): APIC ID: 1 > cpu2 (AP): APIC ID: 2 > cpu3 (AP): APIC ID: 4 > ioapic0: Assuming intbase of 0 > ioapic1: Assuming intbase of 16 > ioapic1 <Version 1.1> irqs 16-31 on motherboard > ioapic0 <Version 1.1> irqs 0-15 on motherboard > <snip> > > > -andyf > > _______________________________________________ > 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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