Messages in this thread | | | Date | Sun, 3 Feb 2002 00:13:54 +0100 (MET) | From | Lars Christensen <> | Subject | Re: 2.4.17 agpgart process hang on crash |
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On Sat, 2 Feb 2002, Andrew Morton wrote:
> Lars Christensen wrote: > > > > Hi. I have experienced a problem with the combination of kernel-2.4.16, > > the kernel agpgart module and NVIDIA supplied drivers. I don't know which > > is the cause of the problem. > > > > Symptoms: Whenever an OpenGL application crashes (segfault etc.), the > > process hangs and can't be killed. Responds to no signals (not even 9). ps > > -ef hangs, it seems, when the crashed process is to be listed (some other > > processes are listed first). > > > > Hardware: AMD Athlon 1.333HGZ, ASUS M266 motherboard (AMD761 AGP > > chipset), NVIDIA GeForce2 MX400 gfx card. > > > > The mem=nopentium option have no effect on the problem, but it doesn't > > occur if I use the NVIDIA AGP drivers or kernel 2.4.16 agp drivers. I am > > not able to test the 2.4.17 agpgart with other 3D hardware that nvidia. > > > > This is possibly because the crashing application tries to dump > core, and the kernel gets a fault accessing the video card's > mapping, and deadlocks over the recursive attempt to take mmap_sem. > > Please apply this patch: > > http://www.zip.com.au/~akpm/linux/2.4/2.4.18-pre7/fbmem-mmap.patch > > and send a report back.
No luck. Still hangs (e.g. with ./testgart & pkill -ABRT testgart), with and without that patch and with and without 2.4.18-pre7. Does seem to happen when dumping core--it doesn't happen with core dumping disabled.
-- Lars Christensen, larsch@cs.auc.dk
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