This series improves handling of large number of dquots. It replaced the direct recycling of dquots from the freelist with a shrinker, removes the upper bound of dquots, and uses per-filesystem structures for all quota state, including switching from a hash to a radix-tree for lookups. For repeated lookups of dquots out of a large pool I see improvements betwen 50% and 500% compared to the previous code. All these tests have been performed with Q_XQUOTASYNC already disabled as it would change the result to much for both the old and new code. Note that the first patch probably is a candidate for Linux 3.3, as the previous quota updates caused a lock order reversal in the old quota reclaim code. See the actual patch for more details. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
