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

[Simon Jeons <simon.jeons@gmail.com>]

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

> 	sleep 2s
> done

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