Messages in this thread | | | Date | Fri, 9 Nov 2012 20:04:28 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH v6 25/29] memcg/sl[au]b: shrink dead caches |
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On Thu, 8 Nov 2012, Andrew Morton wrote:
> > kmem_cache_shrink is also used internally. Its simply releasing unused > > cached objects. > > Only in slub. It could be removed outright from the others and > simplified in slub.
Both SLAB and SLUB must purge their queues before closing/destroying a cache. There is not much code that can be eliminated.
> > Because the core cache shrinking needs the slab caches to free up memory > > from inodes and dentries. We could call kmem_cache_shrink at the end of > > the shrink passes in vmscan. The price would be that the caches would have > > to be repopulated when new allocations occur. > > Well, the shrinker shouldn't strips away all the cache. It will perform > a partial trim, the magnitude of which increases with perceived > external memory pressure.
The partial trim of the objects cached by SLAB is performed in 2 second intervals from the cache reaper.
We are talking here about flushing all the cached objects from the inode and dentry cache etc in vmscan right?
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