Re: System freezes when RAM is full (64-bit)

Ivan Danov <huhavel@xxxxxxxxx> · Thu, 04 Apr 2013 16:10:06 +0200

    Hi Michal,

      Yes, I use swap partition (2GB), but I have applied some things
      for keeping the life of the SSD hard drive longer. All the things
      I have done are under point 3. at

      http://www.rileybrandt.com/2012/11/18/linux-ultrabook/.
      By system freezes, I mean that the desktop environment doesn't
      react on my input. Just sometimes the mouse is reacting very very
      choppy and slowly, but most of the times it is not reacting at
      all. In the attached file, I have the output of the script and the
      content of dmesg for all levels from warn to emerg, as well as my
      kernel config.

      Best,

      Ivan

      --

      On 04/04/13 09:08, Michal Hocko wrote:

      On Thu 04-04-13 08:27:18, Simon Jeons wrote:

        On 04/03/2013 08:12 PM, Michal Hocko wrote:

          On Mon 01-04-13 21:14:40, Ivan Danov wrote:

            The system freezes when RAM gets completely full. By using MATLAB, I
can get all 8GB RAM of my laptop full and it immediately freezes,
needing restart using the hardware button.

          Do you use swap (file/partition)? How big? Could you collect
/proc/meminfo and /proc/vmstat (every few seconds)[1]?
What does it mean when you say the system freezes? No new processes can
be started or desktop environment doesn't react on your input? Do you
see anything in the kernel log? OOM killer e.g.
In case no new processes could be started what does sysrq+m say when the
system is frozen?

What is your kernel config?

            Other people have
reported the bug at since 2007. It seems that only the 64-bit
version is affected and people have reported that enabling DMA in
BIOS settings solve the problem. However, my laptop lacks such an
option in the BIOS settings, so I am unable to test it. More
information about the bug could be found at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1162073 and
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356.

Best Regards,
Ivan

          ---
[1] E.g. by
while true
do
	STAMP=`date +%s`
	cat /proc/meminfo > meminfo.$STAMP
	cat /proc/vmscan > meminfo.$STAMP

        s/vmscan/vmstat

      Right. Sorry about the typo and thanks for pointing out Simon.

          	sleep 2s
done

Attachment:
bug.tar.gz

Description: GNU Zip compressed data