On Fri, Aug 29, 2014 at 03:03:19PM +0800, Weijie Yang wrote: > When enter page_alloc slowpath, we wakeup kswapd on every pgdat > according to the zonelist and high_zoneidx. However, this doesn't > take nodemask into account, and could prematurely wakeup kswapd on > some unintended nodes. > > This patch uses for_each_zone_zonelist_nodemask() instead of > for_each_zone_zonelist() in wake_all_kswapds() to avoid the above situation. > > Signed-off-by: Weijie Yang <[email protected]>
Just out of curiousity, did you measure a problem due to this or is the patch due to code inspection? It was known that we examined useless nodes but assumed to not be a problem because the watermark check should prevent spurious wakeups. However, we do a cpuset check and this patch is consistent with that so regardless of why you wrote the patch Acked-by: Mel Gorman <[email protected]> -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
