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Subject2.6.28-rc8 big regression in VM
Hello,

I noticed that in the current git head, the VM subsystem contains a serious
bug - cached memory is newer freed:

# free; echo 3 > /proc/sys/vm/drop_caches; free
total used free shared buffers cached
Mem: 2016688 669172 1347516 0 2160 335120
-/+ buffers/cache: 331892 1684796
Swap: 1542232 0 1542232
total used free shared buffers cached
Mem: 2016688 659336 1357352 0 320 327288
-/+ buffers/cache: 331728 1684960
Swap: 1542232 0 1542232
the above sequence has been done on completly idle system so there is no
reason for non freeing the cache.

once the whole memory is eaten by the cache, the system is pretty unusable.

--
Lukáš Hejtmánek
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