Date: Mon, 23 Nov 1998 21:41:56 -0800 From: Mike Smith <mike@smith.net.au> To: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> Cc: dg@root.com, smp@FreeBSD.ORG Subject: Re: hangs with SMP Message-ID: <199811240541.VAA02714@dingo.cdrom.com> In-Reply-To: Your message of "Tue, 24 Nov 1998 02:45:12 GMT." <199811240245.SAA12859@GndRsh.aac.dev.com>
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> > I just started doing some testing of the -current SMP code and had a hard > > hang a few minutes into a "make -j2 world". The machine seemed quite dead - > > even the soft power switch didn't work. The hang occured during heavy disk > > I/O, so it seems like it could be a problem with managing the APIC. The > > machine is a dual PII/450 on a Tyan S1836DLUAN-GX motherboard. > > FYI, the ``soft power switch'' normally needs the CPU to respond in order > for it to work, however, there is a timeout circuit such that if the > switch is held for >4 or so seconds the power supply is told to shut down. Also, the "soft power" switch normally generates an SMI, which is akin to an NMI and very difficult to ignore. You have to have the system pretty solidly wedged (APIC gummed might do it, not sure) before it stops working. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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