mirror of https://gitee.com/openkylin/linux.git
535972771d
During shrinking, we walk over the list of objects searching for victims. Any that are not removed are put back into the global list. Currently, they are put back in order (at the front) which means they will be first to be scanned again. If we instead move them to the rear of the list, we will scan new potential victims on the next pass and waste less time rescanning unshrinkable objects. Normally the lists are kept in rough order to shrinking (with object least frequently used at the start), by moving just scanned objects to the rear we are acknowledging that they are still in use. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161101084843.3961-3-chris@chris-wilson.co.uk |
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