Messages in this thread | | | Date | Wed, 14 Nov 2012 15:32:43 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v5 00/11] Introduce huge zero page |
| |
On Wed, 14 Nov 2012 23:20:13 +0000 Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > I'm still a bit concerned over the possibility that some workloads will > > cause a high-frequency free/alloc/memset cycle on that huge zero page. > > We'll see how it goes... > > That is easy enough to fix - we can delay the freeing by a random time or > until memory pressure is applied. >
The current code does the latter, by freeing the page via a "slab"-shrinker callback.
But I do suspect that with the right combination of use/unuse and memory pressure, we could still get into the high-frequency scenario.
| |