On Thu, Feb 03, 2011 at 09:36:47AM -0500, Rik van Riel wrote: > On 02/02/2011 09:58 PM, Andrea Arcangeli wrote: > > > Comments welcome, > > Thanks! > > Andrea > > > >> ==== > >> Subject: vmscan: kswapd must not free more than high_wmark pages > > NAK > > I believe we need a little bit of slack above high_wmark_pages, > to be able to even out memory pressure between zones. > > Maybe free up to high_wmark_pages + min_wmark_pages ? If this can only go in with high+min that's still better than *8, but in prev email on this thread I explained why I think it's not beneficial for lru balancing and this level can't affect kswapd wakeup times either, so I personally prefer just "high". I don't think out of memory has anything to do with this the "min" level is all about the PF_MEMALLOC and OOM levels. The zone balancing as well has nothing to do with this and the only "hard" thing that guarantees balancing is the lowmem reserve ratio (high ptes allocated in lowmem zones aren't relocatable etc..). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx 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>