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

[Ivan Danov <huhavel@gmail.com>]

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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


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