On Tue, 27 Sep 2011 09:27:14 +0200 Johannes Weiner <jweiner@xxxxxxxxxx> wrote: > At one point, anonymous pages were supposed to go on the unevictable > list when no swap space was configured, and the idea was to manually > rescue those pages after adding swap and making them evictable again. > But nowadays, swap-backed pages on the anon LRU list are not scanned > without available swap space anyway, so there is no point in moving > them to a separate list anymore. > > The manual rescue could also be used in case pages were stranded on > the unevictable list due to race conditions. But the code has been > around for a while now and newly discovered bugs should be properly > reported and dealt with instead of relying on such a manual fixup. > > In addition to the lack of a usecase, the sysfs interface to rescue > pages from a specific NUMA node has been broken since its > introduction, so it's unlikely that anybody ever relied on that. > > This patch removes the functionality behind the sysctl and the > node-interface and emits a one-time warning when somebody tries to > access either of them. > > Signed-off-by: Johannes Weiner <jweiner@xxxxxxxxxx> > Reported-by: Kautuk Consul <consul.kautuk@xxxxxxxxx> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>