Messages in this thread | | | Date | Fri, 14 Nov 2003 21:24:11 +0100 (CET) | From | Maciej Zenczykowski <> | Subject | Re: 2.4.23-pre9 ide+XFree+ptrace=Complete hang |
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> As I've said it doesn't respond to pings. As far as I can tell the > processor might as well be doing a cli hlt. As for X - I've had X crash > (many) times and never in an unrestorable way - usually you can login from > the network or hit my hotkey Fn+\ for bios vm86 int 10 screen reset...
Well, I've just had the machine crash another two times, the first time I thought it might have been a different bug, but looking back it was the same issue. This time the lockup happened during an ssh session in an xterm under X - ie. no disk access, no strace/ptrace. Again it happened during screen update (half a character line on screen, the other half still containing the old chars) - obviously this is an Xserver Cyber9525DVD issue. It would seem though that strace and ide access greatly increase the probability of a hang happening. I'm wondering if there is any way to get the Xserver running without iopl(3) but using ioperm instead - I know that the io bitmap is only 0x400 ports, could this possibly be changed to encompass all 0x10000 ports and then redirect iopl(n) to ioperm(0,0x10000,n==3), plus patch sigsegv handler to ignore cli/sti, thus forcing interrupts to always remain enabled. Cause that's where the problem seems to live. This would probably allow at least a trace via serial console, etc...
Any ideas on how to trace this down (no nmi watchdog available)?
Cheers, MaZe.
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