Re: PROBLEM: DMA over CPU" memory leak in Kernel 2.6.8.1

[Con Kolivas <kernel@kolivas.org>]

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Christopher Beppler wrote:
> Hi... this is my first bug report. I hope that it will help you.
> 
> Thank You
> 
> 1.
> "DMA over CPU" memory leak if I burn Audio-CDs
> 
> 2.
> I installed Linux 2.6.8.1 and tried to burn an Audio-CD. Then the PC 
> swapped a lot until he freezes. I tried to increase the swap-partition 
> without a success. Then I stopped burning with xcdroast and burned on 
> the bash directly with cdrecord (dev=ATAPI:0,1,0). Then I saw always at 
> the same time. DMA over CPU-Error... an many memory dumps rushed over my 
> screen and he started "swapping to death" He killed some processes to 
> get more memory (I have 256MB RAM and 384 MB swap). I am not able to 
> print these Error-Messages, because I have no access to my PC then. Then 
> I installed Linux 2.6.7 again and everything works probably.

Known bug. There is a fix for this in the 2.6.8.1-mm3 patch. You can 
download just the required patches to fix this problem by applying these 
two patches:

http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.8.1/2.6.8.1-mm3/broken-out/bio_uncopy_user-mem-leak.patch
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.8.1/2.6.8.1-mm3/broken-out/bio_uncopy_user-mem-leak-fix.patch

Always worth checking the recent linux-kernel archives before filing a 
report but don't let that stop you from filing a bug report.

Thanks,
Con

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