On Thursday 31 March 2005 08:03 pm, Robert Watson wrote: > On Thu, 31 Mar 2005, John Baldwin wrote: > > On Thursday 31 March 2005 03:38 pm, William Michael Grim wrote: > > > Hello. > > > > > > I keep having kernel panics every couple weeks on my system. It occurs > > > in the sched_switch() function. There are several other statements in > > > the backtrace involving "??"; what are those? > > > > > > I have attached the dump output and system info to this email. Any > > > feedback would be helpful. > > > > > > Thanks so much for your help. > > > > The real trace ends with Xint0x80_syscall(). The rest after that is > > garbage memory. Your real problem is in exit1() or ttywakeup(). Since > > ttywakeup() doesn't call exit1() (AFAIK), the exit1() frame is probably > > bogus (gdb doesn't grok trapframes maybe?) and the real bug is a NULL > > pointer deref in ttywakeup(). Perhaps it's a bug in the ptc driver? > > (ptcopen is in the trace). What is the ptc driver anyway? > > I think we have a race in -STABLE relating to tty wakeups and > open/close/device teardown. I've seen a panic relating to sio during a > tty close on RELENG_5 about 5-6 months ago, but was unable to get a dump. > Scott has since fixed dumps with twe, but I've not yet been able to get > the bug to recur. I'll give it another try.
Sounds very plausible. Does Poul-Henning have any ideas? -- John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
