Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a fairly beefy Arch Linux computer, kernel 3.7.7-1-ARCH. However, recently it's been having random freeze ups. Never common, but it'd freeze for a good 15 seconds where no program is responsive. Sometimes the mouse freezes with it and the cursor doesn't move. After this happens, it'll usually happen 2 or 3 more times until I decide to just restart my computer.

It just happened again a few minutes ago and this time I traced it using top. Whenever my computer would freeze, khugepaged CPU usage would randomly rise to 100%.

I run VMWare with 7 gigs of RAM assigned to it, however, my computer has 16G of RAM. When this last freeze up happened, I had 6G of RAM free. To give an idea, heres the header of top

KiB Mem:  16394208 total, 10194584 used,  6199624 free,        4 buffers
KiB Swap:  8388604 total,   103916 used,  8284688 free,  8788952 cached

I've seen some ways to disable khugepaged, but what bad effects could this cause? How can I just get it to behave better?

share|improve this question

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.