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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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