Re: [PATCH 4/5] mm: Only IPI CPUs to drain local pages if theyexist

[Christoph Lameter]

On Mon, 26 Sep 2011, Gilad Ben-Yossef wrote:

> I do not know if these scenarios warrant the additional overhead,
> certainly not in all situations. Maybe the right thing is to make it a
> config option dependent. As I stated in the patch description, that is
> one of the thing I'm interested in feedback on.

The flushing of the per cpu pages only done when kmem_cache_shrink() is
run or when a slab cache is closed. And for diagnostics. So its rare and
not performance critical.


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