On Fri, 13 May 2011, Mel Gorman wrote: > To avoid locking and per-cpu overhead, SLUB optimisically uses > high-order allocations and falls back to lower allocations if they > fail. However, by simply trying to allocate, kswapd is woken up to > start reclaiming at that order. On a desktop system, two users report > that the system is getting locked up with kswapd using large amounts > of CPU. Using SLAB instead of SLUB made this problem go away. > > This patch prevents kswapd being woken up for high-order allocations. > Testing indicated that with this patch applied, the system was much > harder to hang and even when it did, it eventually recovered. > > Signed-off-by: Mel Gorman <mgorman@xxxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
