On Wed, 14 Nov 2012 23:20:13 +0000 Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>