Re: [PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-08 Thread Mel Gorman
On Tue, Apr 08, 2014 at 09:14:05AM -0500, Christoph Lameter wrote: > On Mon, 7 Apr 2014, Mel Gorman wrote: > > > zone_reclaim_mode causes processes to prefer reclaiming memory from local > > node instead of spilling over to other nodes. This made sense initially when > > NUMA machines were almost

Re: [PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-08 Thread Christoph Lameter
On Mon, 7 Apr 2014, Mel Gorman wrote: > zone_reclaim_mode causes processes to prefer reclaiming memory from local > node instead of spilling over to other nodes. This made sense initially when > NUMA machines were almost exclusively HPC and the workload was partitioned > into nodes. The NUMA penal

[PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-08 Thread Mel Gorman
zone_reclaim_mode causes processes to prefer reclaiming memory from local node instead of spilling over to other nodes. This made sense initially when NUMA machines were almost exclusively HPC and the workload was partitioned into nodes. The NUMA penalties were sufficiently high to justify reclaimi

Re: [PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-08 Thread Andres Freund
Hi, On 2014-04-07 23:34:27 +0100, Mel Gorman wrote: > zone_reclaim_mode causes processes to prefer reclaiming memory from local > node instead of spilling over to other nodes. This made sense initially when > NUMA machines were almost exclusively HPC and the workload was partitioned > into nodes.

Re: [PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-07 Thread Zhang Yanfei
On 04/08/2014 06:34 AM, Mel Gorman wrote: > zone_reclaim_mode causes processes to prefer reclaiming memory from local > node instead of spilling over to other nodes. This made sense initially when > NUMA machines were almost exclusively HPC and the workload was partitioned > into nodes. The NUMA pe

Re: [PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-07 Thread Johannes Weiner
On Mon, Apr 07, 2014 at 11:34:27PM +0100, Mel Gorman wrote: > zone_reclaim_mode causes processes to prefer reclaiming memory from local > node instead of spilling over to other nodes. This made sense initially when > NUMA machines were almost exclusively HPC and the workload was partitioned > into

[PATCH 1/2] mm: Disable zone_reclaim_mode by default

2014-04-07 Thread Mel Gorman
zone_reclaim_mode causes processes to prefer reclaiming memory from local node instead of spilling over to other nodes. This made sense initially when NUMA machines were almost exclusively HPC and the workload was partitioned into nodes. The NUMA penalties were sufficiently high to justify reclaimi