From: Yang Shi <yang.shi@linux.alibaba.com>
To: mhocko@suse.com, mgorman@techsingularity.net, riel@surriel.com,
hannes@cmpxchg.org, akpm@linux-foundation.org,
dave.hansen@intel.com, keith.busch@intel.com,
dan.j.williams@intel.com, fengguang.wu@intel.com,
fan.du@intel.com, ying.huang@intel.com
Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 03/10] mm: mempolicy: promote page to DRAM for MPOL_HYBRID
Date: Sat, 23 Mar 2019 12:44:28 +0800 [thread overview]
Message-ID: <1553316275-21985-4-git-send-email-yang.shi@linux.alibaba.com> (raw)
In-Reply-To: <1553316275-21985-1-git-send-email-yang.shi@linux.alibaba.com>
With MPOL_HYBRID the memory allocation may end up on non-DRAM node, this
may be not optimal for performance. Promote pages to DRAM with NUMA
balancing for MPOL_HYBRID.
If DRAM nodes are specified, migrate to the specified nodes. If no DRAM
node is specified, migrate to the local DRAM node.
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
---
mm/mempolicy.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 7d0a432..87bc691 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2339,6 +2339,7 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long
struct zoneref *z;
int curnid = page_to_nid(page);
unsigned long pgoff;
+ nodemask_t nmask;
int thiscpu = raw_smp_processor_id();
int thisnid = cpu_to_node(thiscpu);
int polnid = NUMA_NO_NODE;
@@ -2363,7 +2364,24 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long
break;
case MPOL_HYBRID:
- /* Fall through */
+ if (node_isset(curnid, pol->v.nodes) &&
+ node_isset(curnid, def_alloc_nodemask))
+ /* The page is already on DRAM node */
+ goto out;
+
+ /*
+ * Promote to the DRAM node specified by the policy, or
+ * the local DRAM node if no DRAM node is specified.
+ */
+ nodes_and(nmask, pol->v.nodes, def_alloc_nodemask);
+
+ z = first_zones_zonelist(
+ node_zonelist(numa_node_id(), GFP_HIGHUSER),
+ gfp_zone(GFP_HIGHUSER),
+ nodes_empty(nmask) ? &def_alloc_nodemask : &nmask);
+ polnid = z->zone->node;
+
+ break;
case MPOL_BIND:
--
1.8.3.1
next prev parent reply other threads:[~2019-03-23 4:45 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-23 4:44 [RFC PATCH 0/10] Another Approach to Use PMEM as NUMA Node Yang Shi
2019-03-23 4:44 ` [PATCH 01/10] mm: control memory placement by nodemask for two tier main memory Yang Shi
2019-03-23 17:21 ` Dan Williams
2019-03-25 19:28 ` Yang Shi
2019-03-25 23:18 ` Dan Williams
2019-03-25 23:36 ` Yang Shi
2019-03-25 23:42 ` Dan Williams
2019-03-23 4:44 ` [PATCH 02/10] mm: mempolicy: introduce MPOL_HYBRID policy Yang Shi
2019-03-23 4:44 ` Yang Shi [this message]
2019-03-23 4:44 ` [PATCH 04/10] mm: numa: promote pages to DRAM when it is accessed twice Yang Shi
2019-03-29 0:31 ` kbuild test robot
2019-03-23 4:44 ` [PATCH 05/10] mm: page_alloc: make find_next_best_node could skip DRAM node Yang Shi
2019-03-23 4:44 ` [PATCH 06/10] mm: vmscan: demote anon DRAM pages to PMEM node Yang Shi
2019-03-23 6:03 ` Zi Yan
2019-03-25 21:49 ` Yang Shi
2019-03-24 22:20 ` Keith Busch
2019-03-25 19:49 ` Yang Shi
2019-03-27 0:35 ` Keith Busch
2019-03-27 3:41 ` Yang Shi
2019-03-27 13:08 ` Keith Busch
2019-03-27 17:00 ` Zi Yan
2019-03-27 17:05 ` Dave Hansen
2019-03-27 17:48 ` Zi Yan
2019-03-27 18:00 ` Dave Hansen
2019-03-27 20:37 ` Zi Yan
2019-03-27 20:42 ` Dave Hansen
2019-03-28 21:59 ` Yang Shi
2019-03-28 22:45 ` Keith Busch
2019-03-23 4:44 ` [PATCH 07/10] mm: vmscan: add page demotion counter Yang Shi
2019-03-23 4:44 ` [PATCH 08/10] mm: numa: add page promotion counter Yang Shi
2019-03-23 4:44 ` [PATCH 09/10] doc: add description for MPOL_HYBRID mode Yang Shi
2019-03-23 4:44 ` [PATCH 10/10] doc: elaborate the PMEM allocation rule Yang Shi
2019-03-25 16:15 ` [RFC PATCH 0/10] Another Approach to Use PMEM as NUMA Node Brice Goglin
2019-03-25 16:56 ` Dan Williams
2019-03-25 17:45 ` Brice Goglin
2019-03-25 19:29 ` Dan Williams
2019-03-25 23:09 ` Brice Goglin
2019-03-25 23:37 ` Dan Williams
2019-03-26 12:19 ` Jonathan Cameron
2019-03-25 20:04 ` Yang Shi
2019-03-26 13:58 ` Michal Hocko
2019-03-26 18:33 ` Yang Shi
2019-03-26 18:37 ` Michal Hocko
2019-03-27 2:58 ` Yang Shi
2019-03-27 9:01 ` Michal Hocko
2019-03-27 17:34 ` Dan Williams
2019-03-27 18:59 ` Yang Shi
2019-03-27 20:09 ` Michal Hocko
2019-03-28 2:09 ` Yang Shi
2019-03-28 6:58 ` Michal Hocko
2019-03-28 18:58 ` Yang Shi
2019-03-28 19:12 ` Michal Hocko
2019-03-28 19:40 ` Yang Shi
2019-03-28 20:40 ` Michal Hocko
2019-03-28 8:21 ` Dan Williams
2019-03-27 20:14 ` Dave Hansen
2019-03-27 20:35 ` Matthew Wilcox
2019-03-27 20:40 ` Dave Hansen
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