Re: [Tuxonice] crash dump on cleanup pwq_adjust_max_active

Hi,

Am 07.07.2014 18:23, schrieb Harald Judt:
> Hi,
> 
> From time to time, I get the crash dump in the attached screenshot at
> cleanup after resuming from hibernation. I can resume from the same
> image again, and all is fine. I can only reproduce this on one machine.
> 
> This is with 3.15.2, but it might happen with older kernels too. I used
> tuxonice with fbsplash, and only recently switched to the text ui after
> other driver and BIOS related issues have been solved. With fbsplash,
> the screen simply freezes at "Cleanup". Sometimes I have similar freezes
> at hibernation start when freeing memory, but for that I can't provide a
> backtrace at the moment.
> 
> Note that I have BFS-0.449, BFQ-v7-r5 and UKSM-0.1.2.2 patches applied.


Please ignore the problem I have described in the previous mail, it has
been caused by hardware/driver issues. Hibernation itself is working
fine now, with one exception, that is it freezes sometimes when freeing
memory. This seems to depend on the amount of memory used. The more
memory is used, the more likely it is that these freezes occur. I used
stress (http://weather.ou.edu/~apw/projects/stress) trying to reproduce
this, e.g. stress -m 1 --vm-bytes 3G --vm-hang 0. It will not always
freeze, sometimes it will simply say there is not enough free memory,
but usually it will freeze on the second attempt. If I set the image
size to no_cache, the freezes are less likely to happen.

Harald