On 07/25/2012 07:23 PM, Christoph Lameter wrote: > On Fri, 20 Jul 2012, Glauber Costa wrote: > >>> This is the same btw in SLAB which keeps objects in per cpu caches and >>> keeps empty slab pages on special queues. >>> >>>> This patch marks all memcg caches as dead. kmem_cache_shrink is called >>>> for the ones who are not yet dead - this will force internal cache >>>> reorganization, and then all references to empty pages will be removed. >>> >>> You need to call this also for slab to drain the caches and free the pages >>> on the empty list. >>> >> Doesn't the SLAB have a time-based reaper for that? > > Yes but it will take a couple of minutes to drain the caches. > You might have seen in my last submission that included this in the slab as well.
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