* Mel Gorman <mgorman@xxxxxxx> wrote: > > In the full-flushing case (v6 without patch 4) the batching limit is > > 'infinite', we'll batch as long as possible, right? > > No because we must flush before pages are freed so the maximum batching is > related to SWAP_CLUSTER_MAX. If we free a page before the flush then in theory > the page can be reallocated and a stale TLB entry can allow access to unrelated > data. It would be almost impossible to trigger corruption this way but it's a > concern. Well, could we say double SWAP_CLUSTER_MAX to further reduce the IPI rate? Thanks, Ingo -- 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>