From: Fengguang Wu <fengguang.wu@intel.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: Linux Memory Management List <linux-mm@kvack.org>, Fan Du <fan.du@intel.com>, Fengguang Wu <fengguang.wu@intel.com> Cc: kvm@vger.kernel.org Cc: LKML <linux-kernel@vger.kernel.org> Cc: Yao Yuan <yuan.yao@intel.com> Cc: Peng Dong <dongx.peng@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Liu Jingqi <jingqi.liu@intel.com> Cc: Dong Eddie <eddie.dong@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Zhang Yi <yi.z.zhang@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Subject: [RFC][PATCH v2 08/21] mm: introduce and export pgdat peer_node Date: Wed, 26 Dec 2018 21:14:54 +0800 [thread overview] Message-ID: <20181226133351.521151384@intel.com> (raw) In-Reply-To: 20181226131446.330864849@intel.com [-- Attachment #1: 0019-mm-Introduce-and-export-peer_node-for-pgdat.patch --] [-- Type: text/plain, Size: 3314 bytes --] From: Fan Du <fan.du@intel.com> Each CPU socket can have 1 DRAM and 1 PMEM node, we call them "peer nodes". Migration between DRAM and PMEM will by default happen between peer nodes. It's a temp solution. In multiple memory layers, a node can have both promotion and demotion targets instead of a single peer node. User space may also be able to infer promotion/demotion targets based on future HMAT info. Signed-off-by: Fan Du <fan.du@intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> --- drivers/base/node.c | 11 +++++++++++ include/linux/mmzone.h | 12 ++++++++++++ mm/page_alloc.c | 29 +++++++++++++++++++++++++++++ 3 files changed, 52 insertions(+) --- linux.orig/drivers/base/node.c 2018-12-23 19:39:51.647261099 +0800 +++ linux/drivers/base/node.c 2018-12-23 19:39:51.643261112 +0800 @@ -242,6 +242,16 @@ static ssize_t type_show(struct device * } static DEVICE_ATTR(type, S_IRUGO, type_show, NULL); +static ssize_t peer_node_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int nid = dev->id; + struct pglist_data *pgdat = NODE_DATA(nid); + + return sprintf(buf, "%d\n", pgdat->peer_node); +} +static DEVICE_ATTR(peer_node, S_IRUGO, peer_node_show, NULL); + static struct attribute *node_dev_attrs[] = { &dev_attr_cpumap.attr, &dev_attr_cpulist.attr, @@ -250,6 +260,7 @@ static struct attribute *node_dev_attrs[ &dev_attr_distance.attr, &dev_attr_vmstat.attr, &dev_attr_type.attr, + &dev_attr_peer_node.attr, NULL }; ATTRIBUTE_GROUPS(node_dev); --- linux.orig/include/linux/mmzone.h 2018-12-23 19:39:51.647261099 +0800 +++ linux/include/linux/mmzone.h 2018-12-23 19:39:51.643261112 +0800 @@ -713,6 +713,18 @@ typedef struct pglist_data { /* Per-node vmstats */ struct per_cpu_nodestat __percpu *per_cpu_nodestats; atomic_long_t vm_stat[NR_VM_NODE_STAT_ITEMS]; + + /* + * Points to the nearest node in terms of latency + * E.g. peer of node 0 is node 2 per SLIT + * node distances: + * node 0 1 2 3 + * 0: 10 21 17 28 + * 1: 21 10 28 17 + * 2: 17 28 10 28 + * 3: 28 17 28 10 + */ + int peer_node; } pg_data_t; #define node_present_pages(nid) (NODE_DATA(nid)->node_present_pages) --- linux.orig/mm/page_alloc.c 2018-12-23 19:39:51.647261099 +0800 +++ linux/mm/page_alloc.c 2018-12-23 19:39:51.643261112 +0800 @@ -6926,6 +6926,34 @@ static void check_for_memory(pg_data_t * } } +/* + * Return the nearest peer node in terms of *locality* + * E.g. peer of node 0 is node 2 per SLIT + * node distances: + * node 0 1 2 3 + * 0: 10 21 17 28 + * 1: 21 10 28 17 + * 2: 17 28 10 28 + * 3: 28 17 28 10 + */ +static int find_best_peer_node(int nid) +{ + int n, val; + int min_val = INT_MAX; + int peer = NUMA_NO_NODE; + + for_each_online_node(n) { + if (n == nid) + continue; + val = node_distance(nid, n); + if (val < min_val) { + min_val = val; + peer = n; + } + } + return peer; +} + /** * free_area_init_nodes - Initialise all pg_data_t and zone data * @max_zone_pfn: an array of max PFNs for each zone @@ -7012,6 +7040,7 @@ void __init free_area_init_nodes(unsigne if (pgdat->node_present_pages) node_set_state(nid, N_MEMORY); check_for_memory(pgdat, nid); + pgdat->peer_node = find_best_peer_node(nid); } }
WARNING: multiple messages have this Message-ID (diff)
From: Fengguang Wu <fengguang.wu@intel.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: Linux Memory Management List <linux-mm@kvack.org>, Fan Du <fan.du@intel.com>, Fengguang Wu <fengguang.wu@intel.com>, kvm@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>, Yao Yuan <yuan.yao@intel.com>, Peng Dong <dongx.peng@intel.com>, Huang Ying <ying.huang@intel.com>, Liu Jingqi <jingqi.liu@intel.com>, Dong Eddie <eddie.dong@intel.com>, Dave Hansen <dave.hansen@intel.com>, Zhang Yi <yi.z.zhang@linux.intel.com>, Dan Williams <dan.j.williams@intel.com> Subject: [RFC][PATCH v2 08/21] mm: introduce and export pgdat peer_node Date: Wed, 26 Dec 2018 21:14:54 +0800 [thread overview] Message-ID: <20181226133351.521151384@intel.com> (raw) In-Reply-To: 20181226131446.330864849@intel.com [-- Attachment #1: 0019-mm-Introduce-and-export-peer_node-for-pgdat.patch --] [-- Type: text/plain, Size: 3312 bytes --] From: Fan Du <fan.du@intel.com> Each CPU socket can have 1 DRAM and 1 PMEM node, we call them "peer nodes". Migration between DRAM and PMEM will by default happen between peer nodes. It's a temp solution. In multiple memory layers, a node can have both promotion and demotion targets instead of a single peer node. User space may also be able to infer promotion/demotion targets based on future HMAT info. Signed-off-by: Fan Du <fan.du@intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> --- drivers/base/node.c | 11 +++++++++++ include/linux/mmzone.h | 12 ++++++++++++ mm/page_alloc.c | 29 +++++++++++++++++++++++++++++ 3 files changed, 52 insertions(+) --- linux.orig/drivers/base/node.c 2018-12-23 19:39:51.647261099 +0800 +++ linux/drivers/base/node.c 2018-12-23 19:39:51.643261112 +0800 @@ -242,6 +242,16 @@ static ssize_t type_show(struct device * } static DEVICE_ATTR(type, S_IRUGO, type_show, NULL); +static ssize_t peer_node_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int nid = dev->id; + struct pglist_data *pgdat = NODE_DATA(nid); + + return sprintf(buf, "%d\n", pgdat->peer_node); +} +static DEVICE_ATTR(peer_node, S_IRUGO, peer_node_show, NULL); + static struct attribute *node_dev_attrs[] = { &dev_attr_cpumap.attr, &dev_attr_cpulist.attr, @@ -250,6 +260,7 @@ static struct attribute *node_dev_attrs[ &dev_attr_distance.attr, &dev_attr_vmstat.attr, &dev_attr_type.attr, + &dev_attr_peer_node.attr, NULL }; ATTRIBUTE_GROUPS(node_dev); --- linux.orig/include/linux/mmzone.h 2018-12-23 19:39:51.647261099 +0800 +++ linux/include/linux/mmzone.h 2018-12-23 19:39:51.643261112 +0800 @@ -713,6 +713,18 @@ typedef struct pglist_data { /* Per-node vmstats */ struct per_cpu_nodestat __percpu *per_cpu_nodestats; atomic_long_t vm_stat[NR_VM_NODE_STAT_ITEMS]; + + /* + * Points to the nearest node in terms of latency + * E.g. peer of node 0 is node 2 per SLIT + * node distances: + * node 0 1 2 3 + * 0: 10 21 17 28 + * 1: 21 10 28 17 + * 2: 17 28 10 28 + * 3: 28 17 28 10 + */ + int peer_node; } pg_data_t; #define node_present_pages(nid) (NODE_DATA(nid)->node_present_pages) --- linux.orig/mm/page_alloc.c 2018-12-23 19:39:51.647261099 +0800 +++ linux/mm/page_alloc.c 2018-12-23 19:39:51.643261112 +0800 @@ -6926,6 +6926,34 @@ static void check_for_memory(pg_data_t * } } +/* + * Return the nearest peer node in terms of *locality* + * E.g. peer of node 0 is node 2 per SLIT + * node distances: + * node 0 1 2 3 + * 0: 10 21 17 28 + * 1: 21 10 28 17 + * 2: 17 28 10 28 + * 3: 28 17 28 10 + */ +static int find_best_peer_node(int nid) +{ + int n, val; + int min_val = INT_MAX; + int peer = NUMA_NO_NODE; + + for_each_online_node(n) { + if (n == nid) + continue; + val = node_distance(nid, n); + if (val < min_val) { + min_val = val; + peer = n; + } + } + return peer; +} + /** * free_area_init_nodes - Initialise all pg_data_t and zone data * @max_zone_pfn: an array of max PFNs for each zone @@ -7012,6 +7040,7 @@ void __init free_area_init_nodes(unsigne if (pgdat->node_present_pages) node_set_state(nid, N_MEMORY); check_for_memory(pgdat, nid); + pgdat->peer_node = find_best_peer_node(nid); } }
next prev parent reply other threads:[~2018-12-26 13:38 UTC|newest] Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-12-26 13:14 [RFC][PATCH v2 00/21] PMEM NUMA node and hotness accounting/migration Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 01/21] e820: cheat PMEM as DRAM Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-27 3:41 ` Matthew Wilcox 2018-12-27 4:11 ` Fengguang Wu 2018-12-27 5:13 ` Dan Williams 2018-12-27 5:13 ` Dan Williams 2018-12-27 19:32 ` Yang Shi 2018-12-27 19:32 ` Yang Shi 2018-12-28 3:27 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 02/21] acpi/numa: memorize NUMA node type from SRAT table Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 03/21] x86/numa_emulation: fix fake NUMA in uniform case Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 04/21] x86/numa_emulation: pass numa node type to fake nodes Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 05/21] mmzone: new pgdat flags for DRAM and PMEM Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 06/21] x86,numa: update numa node type Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 07/21] mm: export node type {pmem|dram} under /sys/bus/node Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu [this message] 2018-12-26 13:14 ` [RFC][PATCH v2 08/21] mm: introduce and export pgdat peer_node Fengguang Wu 2018-12-27 20:07 ` Christopher Lameter 2018-12-27 20:07 ` Christopher Lameter 2018-12-28 2:31 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 09/21] mm: avoid duplicate peer target node Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 10/21] mm: build separate zonelist for PMEM and DRAM node Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2019-01-01 9:14 ` Aneesh Kumar K.V 2019-01-01 9:14 ` Aneesh Kumar K.V 2019-01-07 9:57 ` Fengguang Wu 2019-01-07 14:09 ` Aneesh Kumar K.V 2018-12-26 13:14 ` [RFC][PATCH v2 11/21] kvm: allocate page table pages from DRAM Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2019-01-01 9:23 ` Aneesh Kumar K.V 2019-01-01 9:23 ` Aneesh Kumar K.V 2019-01-02 0:59 ` Yuan Yao 2019-01-02 16:47 ` Dave Hansen 2019-01-07 10:21 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 12/21] x86/pgtable: " Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:14 ` [RFC][PATCH v2 13/21] x86/pgtable: dont check PMD accessed bit Fengguang Wu 2018-12-26 13:14 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 14/21] kvm: register in mm_struct Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2019-02-02 6:57 ` Peter Xu 2019-02-02 10:50 ` Fengguang Wu 2019-02-04 10:46 ` Paolo Bonzini 2018-12-26 13:15 ` [RFC][PATCH v2 15/21] ept-idle: EPT walk for virtual machine Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 16/21] mm-idle: mm_walk for normal task Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 17/21] proc: introduce /proc/PID/idle_pages Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 18/21] kvm-ept-idle: enable module Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 19/21] mm/migrate.c: add move_pages(MPOL_MF_SW_YOUNG) flag Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 20/21] mm/vmscan.c: migrate anon DRAM pages to PMEM node Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-26 13:15 ` [RFC][PATCH v2 21/21] mm/vmscan.c: shrink anon list if can migrate to PMEM Fengguang Wu 2018-12-26 13:15 ` Fengguang Wu 2018-12-27 20:31 ` [RFC][PATCH v2 00/21] PMEM NUMA node and hotness accounting/migration Michal Hocko 2018-12-28 5:08 ` Fengguang Wu 2018-12-28 8:41 ` Michal Hocko 2018-12-28 9:42 ` Fengguang Wu 2018-12-28 12:15 ` Michal Hocko 2018-12-28 13:15 ` Fengguang Wu 2018-12-28 13:15 ` Fengguang Wu 2018-12-28 19:46 ` Michal Hocko 2018-12-28 13:31 ` Fengguang Wu 2018-12-28 18:28 ` Yang Shi 2018-12-28 18:28 ` Yang Shi 2018-12-28 19:52 ` Michal Hocko 2019-01-02 12:21 ` Jonathan Cameron 2019-01-02 12:21 ` Jonathan Cameron 2019-01-08 14:52 ` Michal Hocko 2019-01-10 15:53 ` Jerome Glisse 2019-01-10 15:53 ` Jerome Glisse 2019-01-10 16:42 ` Michal Hocko 2019-01-10 17:42 ` Jerome Glisse 2019-01-10 17:42 ` Jerome Glisse 2019-01-10 18:26 ` Jonathan Cameron 2019-01-10 18:26 ` Jonathan Cameron 2019-01-28 17:42 ` Jonathan Cameron 2019-01-28 17:42 ` Jonathan Cameron 2019-01-29 2:00 ` Fengguang Wu 2019-01-03 10:57 ` Mel Gorman 2019-01-10 16:25 ` Jerome Glisse 2019-01-10 16:25 ` Jerome Glisse 2019-01-10 16:50 ` Michal Hocko 2019-01-10 18:02 ` Jerome Glisse 2019-01-10 18:02 ` Jerome Glisse 2019-01-02 18:12 ` Dave Hansen 2019-01-08 14:53 ` Michal Hocko
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