Messages in this thread | | | From | Mel Gorman <> | Subject | [PATCH 0/2] Disable zone_reclaim_mode by default | Date | Mon, 7 Apr 2014 23:34:26 +0100 |
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When it was introduced, zone_reclaim_mode made sense as NUMA distances punished and workloads were generally partitioned to fit into a NUMA node. NUMA machines are now common but few of the workloads are NUMA-aware and it's routine to see major performance due to zone_reclaim_mode being disabled but relatively few can identify the problem.
Those that require zone_reclaim_mode are likely to be able to detect when it needs to be enabled and tune appropriately so lets have a sensible default for the bulk of users.
Documentation/sysctl/vm.txt | 17 +++++++++-------- include/linux/mmzone.h | 1 - mm/page_alloc.c | 17 +---------------- 3 files changed, 10 insertions(+), 25 deletions(-)
-- 1.8.4.5
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