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    [PATCH] zone_reclaim: configurable off node allocation period. · 2a11ff06
    Christoph Lameter 提交于
    Currently the zone_reclaim code has a fixed window of 30 seconds of off node
    allocations should a local zone have no unused pagecache pages left.  Reclaim
    will be attempted again after this timeout period to avoid repeated useless
    scans for memory.  This is also useful to established sufficiently large off
    node allocation chunks to relieve the local node.
    
    It may be beneficial to adjust that time period for some special situations.
    For example if memory use was exceeding node capacity one may want to give up
    for longer periods of time.  If memory spikes intermittendly then one may want
    to shorten the time period to reduce the number of off node allocations.
    
    This patch allows just that....
    Signed-off-by: NChristoph Lameter <clameter@sgi.com>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    2a11ff06
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