Date: Tue, 18 May 1999 20:19:23 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> Cc: jdp@polstra.com, alpha@freebsd.org Subject: Re: Panic: warning: pmap_changebit didn't. Message-ID: <Pine.BSF.4.05.9905182018130.509-100000@herring.nlsystems.com> In-Reply-To: <14145.11959.719375.15587A@ett.sat.t.u-tokyo.ac.jp>
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On Tue, 18 May 1999, Hidetoshi Shimokawa wrote: > At Tue, 18 May 1999 09:30:14 +0100 (BST), > Doug Rabson <dfr@nlsystems.com> wrote: > > > > On Tue, 18 May 1999, Hidetoshi Shimokawa wrote: > > > > > I get same panic now (current of yesterday). > > > > > > panic: warning: pmap_changebit didn't. > > > panic > > > Stopped at Debugger+0x2c: ldq ra,0(sp) <0xfffffe000ce0bbe0> > > > <ra=0xfffffc0000485800,sp=0xfffffe000ce0bbe0> > > > db> trace > > > Debugger() at Debugger+0x2c > > > panic() at panic+0xfc > > > pmap_emulate_reference() at pmap_emulate_reference+0x120 > > > trap() at trap+0x2b0 > > > XentMM() at XentMM+0x20 > > > swapout_procs() at swapout_procs+0x174 > > > (null)() at 0 > > > > > > I can generate crash dump, but it must be more than 500MB. > > > I'll leave it in DDB for while. If you have something to examine, > > > let me know. > > > > It would be useful to find out the values of pa, *pte and faultoff. > > > > Unfortunately I cannot use gdb now. > > db> gdb > No gdb port enabled. Set flag 0x80 on desired port > in your configuration file (currently sio only). > > Last time, I was able to use gdb with the flag 0x50. > I found the following code in /sys/isa/sio.c Currently, gdb is hardwired to sio1 on the alpha. I don't think it needs any other flags but 0x80 might help. > > I give up to use gdb via serial and get the crash dump. > But stock gdb seems not to understand crash dump yet. I haven't had time to sort that out yet. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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