Messages in this thread | | | From | Al Boldi <> | Subject | [Regression] mm: Huge swapout performance regression on recent kernels | Date | Tue, 20 Jul 2010 15:07:31 +0300 |
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I have noticed a big swapout performance regression on recent kernels using the following testcase:
swapon /dev/md0 (raid0) mount none /dev/shm -t tmpfs -o size=10G cat /dev/full > /dev/shm/tst.dmp
Kernel starts to swapout at full speed after filling physical ram. Then, kernel progressively slows down swapout after crossing the ~3G VM threshold, compounding at over 50% slowdown when reaching the 10G tmpfs limit.
Has this been fixed?
Thanks!
-- Al
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