-- On 05/04/13 13:59, Michal Hocko wrote:
On Fri 05-04-13 12:13:11, Ivan Danov wrote:Tried with vm.swappiness=60, but the only improvement is that now the mouse input is less choppy than before, but still the problem remains - the computer is not usable at all, one could not even stop the program, causing the problem.OK, could you collect /proc/vmstat and /proc/meminfo during that load?Best, Ivan -- On 04/04/13 17:16, Michal Hocko wrote:On Thu 04-04-13 16:10:06, Ivan Danov wrote: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/.OK, I guess I know what's going on here. So you did set vm.swappiness=0 which (for some time) means that there is almost no swapping going on (although you have plenty of swap as you are mentioning above). This shouldn't be a big deal normally but you are also backing your /tmp on tmpfs which is in-memory filesystem. This means that if you are writing to /tmp a lot then this content will fill up your memory which is not swapped out until the memory reclaim is getting into real troubles - most of the page cache is dropped by that time so your system starts trashing. I would encourage you to set swappiness to a more reasonable value (I would use the default value which is 60). I understand that you are concerned about your SSD lifetime but your user experience sounds like a bigger priority ;)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.I haven't checked your attached data but you should get an overview from Shmem line from /proc/meminfo which tells you how much shmem/tmpfs memory you are using and grep "^Swap" /proc/meminfo will tell you more about your swap usage.Best, IvanHTH
Attachment:
bug-with-swappiness.tar.gz
Description: GNU Zip compressed data