On 04/25/2015 01:45 PM, Mel Gorman wrote: > An IPI is sent to flush remote TLBs when a page is unmapped that was > recently accessed by other CPUs. There are many circumstances where this > happens but the obvious one is kswapd reclaiming pages belonging to a > running process as kswapd and the task are likely running on separate CPUs.
> It's still a noticeable improvement with vmstat showing interrupts went > from roughly 500K per second to 45K per second. > > The patch will have no impact on workloads with no memory pressure or > have relatively few mapped pages. > > Signed-off-by: Mel Gorman <mgor...@suse.de> Reviewed-by: Rik van Riel <r...@redhat.com> -- All rights reversed -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
