Messages in this thread |  | | From | (Linus Torvalds) | Subject | Re: Freeze on FPU exception with Athlon | Date | 17 Nov 2000 19:48:21 -0800 |
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In article <20001118014019.18006.qmail@web3404.mail.yahoo.com>, =?iso-8859-1?q?Markus=20Schoder?= <markus_schoder@yahoo.de> wrote: >The following small program (linked against glibc 2.1.3) reliably >freezes my system (Athlon Thunderbird CPU) with at least kernels >2.4.0-test10 and 2.4.0-test11-pre5. Even the SysRq keys do not work >after the freeze.
Are you sure sysrq doesn't work? Many distributions will disable the kernel printing to the console, or move it to console 7 or similar.
It would be really good to get the EIP trace of RightAlt+ScrollLock pressed a few times if you can try to see if you can use klogd to enable proper printk's.
>Older kernels (e.g. 2.3.40) seem to work. Any Ideas?
The FP exception handling has certainly changed, but the changes should all have affected mainly just PIII kernels with XMM support enabled. An Athlon system should have been pretty unaffected. But I'll take a look if I see something obvious.
One thing to try: if interrupts really don't work for you (and if SysRq doesn't work, that may be the case), please test out a kernel that simply ignores irq13 by just commenting out the line
setup_irq(13, &irq13);
in arch/i386/kernel/i8259.c. Does that make any difference? (irq13 shouldn't be used any more, it's horrible legacy crap, but we do want to support even horrible legacy systems).
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