On (02/08/07 17:14), Mel Gorman didst pronounce: > On (02/08/07 09:44), KAMEZAWA Hiroyuki didst pronounce: > > On Wed, 01 Aug 2007 15:02:51 -0400 > > Lee Schermerhorn <[EMAIL PROTECTED]> wrote: > > > [But, maybe reordering the zonelists is not such a good idea > > > when ZONE_MOVABLE is populated?] > > > > > > > It's case-by-case I think. In zone order with ZONE_MOVABLE case, > > user's page cache will not use ZONE_NORMAL until ZONE_MOVABLE in all node > > is exhausted. This is an expected behavior, I think. > > > > This is expected behaviour. I see no reason for lower zones to be used > for allocations that use memory from a higher zone with free memory. >
Bah. I should have thought of this better. If you are using ZONE_MOVABLE and the zonelist is in zone order, one would use memory from remote nodes when suitable local memory was available. I don't have a quick answer on how this should be handled. The answer may be something like; o When ordering zonelists by nodes, order them so that the movable zone is paired with the next highest zones in a zonelist before moving to the next node > > I think the real problem is the scheme for "How to set zone movable size to > > appropriate value for the system". This needs more study and documentation. > > (but maybe depends on system configuration to some extent.) > > > > It depends on the system configuration and the workload requirements. > Right now, there isn't exact information available on what size the zone > should be. It'll need to be studied over a period of time. > > -- > Mel Gorman > Part-time Phd Student Linux Technology Center > University of Limerick IBM Dublin Software Lab > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to [EMAIL PROTECTED] For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"[EMAIL PROTECTED]"> [EMAIL PROTECTED] </a> -- -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab - 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/
