Date: Wed, 24 Aug 2005 10:39:45 +1200 From: Mark Kirkwood <markir@paradise.net.nz> To: Mark Kirkwood <markir@paradise.net.nz> Cc: freebsd-current@freebsd.org Subject: Re: 6.0 BETA2 reboot hangs on SMP system - progress of a sort Message-ID: <430BA5B1.5080507@paradise.net.nz> In-Reply-To: <430BA1F1.1010907@paradise.net.nz> References: <430BA1F1.1010907@paradise.net.nz>
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Looks like I have false alarmed everybody :-( I must have changed something in my BIOS setup since I last (tried to) reboot, because now 5.4-RELEASE (SMP) reboots ok, and I have made no changes there. I will look around and try to see what it is (a quick glance suggests I have USB enabled now, whereas it may have been disabled before). Apologies for the confusion... Mark Mark Kirkwood wrote: > A brief description of system is (dmesg attached): > > Tyan S2510 dual 1Ghz > RELENG_6 From Aug 14 > GENERIC > > Reboot hangs after displaying "cpu_reset: Stopping other CPUs". This > appears to be a hard lockup, as I cannot break to the debugger. > > In an effort to see where the problem was, I amended > > src/sys/i386/i386/vm_machdep.c > src/sys/kern/subr_smp.c > > Adding some printf statements and removing the #ifdef DIAGNOSTIC in > subr_smp.c, so that it printed always (diffs attached). > > To my surprise, after a kernel rebuild + shutdown and restart, I find > that 'shutdown -r now' and 'reboot' *now work*! Hmmm, nice but weird. > This sort of voodoo suggests something like memory being clobbered > somewhere...
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