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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?
Typical mem info:
MemTotal: 16394208 kB
MemFree: 6542844 kB
Buffers: 4 kB
Cached: 8754308 kB
SwapCached: 21064 kB
Active: 1670140 kB
Inactive: 7846864 kB
Active(anon): 1408516 kB
Inactive(anon): 6826872 kB
Active(file): 261624 kB
Inactive(file): 1019992 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 8388604 kB
SwapFree: 8293100 kB
Dirty: 116 kB
Writeback: 128 kB
AnonPages: 747680 kB
Mapped: 7617588 kB
Shmem: 7472696 kB
Slab: 78080 kB
SReclaimable: 52504 kB
SUnreclaim: 25576 kB
KernelStack: 2344 kB
PageTables: 31188 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 16585708 kB
Committed_AS: 9320348 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 131256 kB
VmallocChunk: 34359570612 kB
HardwareCorrupted: 0 kB
AnonHugePages: 358400 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10240 kB
DirectMap2M: 16726016 kB
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