Date: Sun, 5 Sep 2004 10:53:51 -0400 (EDT) From: Robert Watson <rwatson@freebsd.org> To: Maxim Maximov <mcsi@mcsi.pp.ru> Cc: current@freebsd.org Subject: Re: KQUEUE/TTY related panic Message-ID: <Pine.NEB.3.96L.1040905105252.417E-100000@fledge.watson.org> In-Reply-To: <413AD651.2030504@mcsi.pp.ru>
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On Sun, 5 Sep 2004, Maxim Maximov wrote: > Just got a panic when dropped into DDB by Ctrl-Alt-Esc, issued > 'show witness', pressed ScrLk, pressed PgUp ten times, then PgDn. Then > released cursor by pressing ScrLk again. This is pretty much identical to the panic Jan Srzednicki reported, wherein the syscons code under DDB calls into the TTY code (and really shouldn't). The low level polled console I/O routines are not supposed to mess with schedulers, etc, etc. CC'ing Doug White since he expressed some interest in all this :-). Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research > > db> panic: blockable sleep lock (sleep mutex) tty @ > /usr/src/sys/kern/kern_event.c:1450 > cpuid = 0 > boot() called on cpu#0 > Uptime: 2m22s > > Machine freezes completely here. Keys didn't work. Reset helped. > Tried exactly the same actions after reboot - exactly same effect. > Machine is SMP, HTT, WITNESS enabled, today's HEAD. > Dmesg is at http://mcsi.pp.ru/dmesg.boot > > -- > Maxim Maximov > _______________________________________________ > 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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