From 6715ddf94576ff39f5d1cda8d4c568d3b79e82ec Mon Sep 17 00:00:00 2001 From: Lai Jiangshan Date: Wed, 12 Dec 2012 13:51:49 -0800 Subject: [PATCH] hotplug: update nodemasks management Update nodemasks management for N_MEMORY. [lliubbo@gmail.com: fix build] Signed-off-by: Lai Jiangshan Signed-off-by: Wen Congyang Cc: Christoph Lameter Cc: Hillf Danton Cc: Lin Feng Cc: David Rientjes Signed-off-by: Bob Liu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/memory-hotplug.txt | 5 +- include/linux/memory.h | 1 + mm/memory_hotplug.c | 87 ++++++++++++++++++++++++++------ 3 files changed, 77 insertions(+), 16 deletions(-) diff --git a/Documentation/memory-hotplug.txt b/Documentation/memory-hotplug.txt index c6f993d491b5..8e5eacbdcfa3 100644 --- a/Documentation/memory-hotplug.txt +++ b/Documentation/memory-hotplug.txt @@ -390,6 +390,7 @@ struct memory_notify { unsigned long start_pfn; unsigned long nr_pages; int status_change_nid_normal; + int status_change_nid_high; int status_change_nid; } @@ -397,7 +398,9 @@ start_pfn is start_pfn of online/offline memory. nr_pages is # of pages of online/offline memory. status_change_nid_normal is set node id when N_NORMAL_MEMORY of nodemask is (will be) set/clear, if this is -1, then nodemask status is not changed. -status_change_nid is set node id when N_HIGH_MEMORY of nodemask is (will be) +status_change_nid_high is set node id when N_HIGH_MEMORY of nodemask +is (will be) set/clear, if this is -1, then nodemask status is not changed. +status_change_nid is set node id when N_MEMORY of nodemask is (will be) set/clear. It means a new(memoryless) node gets new memory by online and a node loses all memory. If this is -1, then nodemask status is not changed. If status_changed_nid* >= 0, callback should create/discard structures for the diff --git a/include/linux/memory.h b/include/linux/memory.h index a09216d0dcc7..45e93b468878 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -54,6 +54,7 @@ struct memory_notify { unsigned long start_pfn; unsigned long nr_pages; int status_change_nid_normal; + int status_change_nid_high; int status_change_nid; }; diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index de9cb14ae753..eca4aac1a83b 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -595,13 +595,15 @@ static void node_states_check_changes_online(unsigned long nr_pages, enum zone_type zone_last = ZONE_NORMAL; /* - * If we have HIGHMEM, node_states[N_NORMAL_MEMORY] contains nodes - * which have 0...ZONE_NORMAL, set zone_last to ZONE_NORMAL. + * If we have HIGHMEM or movable node, node_states[N_NORMAL_MEMORY] + * contains nodes which have zones of 0...ZONE_NORMAL, + * set zone_last to ZONE_NORMAL. * - * If we don't have HIGHMEM, node_states[N_NORMAL_MEMORY] contains nodes - * which have 0...ZONE_MOVABLE, set zone_last to ZONE_MOVABLE. + * If we don't have HIGHMEM nor movable node, + * node_states[N_NORMAL_MEMORY] contains nodes which have zones of + * 0...ZONE_MOVABLE, set zone_last to ZONE_MOVABLE. */ - if (N_HIGH_MEMORY == N_NORMAL_MEMORY) + if (N_MEMORY == N_NORMAL_MEMORY) zone_last = ZONE_MOVABLE; /* @@ -615,12 +617,34 @@ static void node_states_check_changes_online(unsigned long nr_pages, else arg->status_change_nid_normal = -1; +#ifdef CONFIG_HIGHMEM + /* + * If we have movable node, node_states[N_HIGH_MEMORY] + * contains nodes which have zones of 0...ZONE_HIGHMEM, + * set zone_last to ZONE_HIGHMEM. + * + * If we don't have movable node, node_states[N_NORMAL_MEMORY] + * contains nodes which have zones of 0...ZONE_MOVABLE, + * set zone_last to ZONE_MOVABLE. + */ + zone_last = ZONE_HIGHMEM; + if (N_MEMORY == N_HIGH_MEMORY) + zone_last = ZONE_MOVABLE; + + if (zone_idx(zone) <= zone_last && !node_state(nid, N_HIGH_MEMORY)) + arg->status_change_nid_high = nid; + else + arg->status_change_nid_high = -1; +#else + arg->status_change_nid_high = arg->status_change_nid_normal; +#endif + /* * if the node don't have memory befor online, we will need to - * set the node to node_states[N_HIGH_MEMORY] after the memory + * set the node to node_states[N_MEMORY] after the memory * is online. */ - if (!node_state(nid, N_HIGH_MEMORY)) + if (!node_state(nid, N_MEMORY)) arg->status_change_nid = nid; else arg->status_change_nid = -1; @@ -631,7 +655,10 @@ static void node_states_set_node(int node, struct memory_notify *arg) if (arg->status_change_nid_normal >= 0) node_set_state(node, N_NORMAL_MEMORY); - node_set_state(node, N_HIGH_MEMORY); + if (arg->status_change_nid_high >= 0) + node_set_state(node, N_HIGH_MEMORY); + + node_set_state(node, N_MEMORY); } @@ -1099,13 +1126,15 @@ static void node_states_check_changes_offline(unsigned long nr_pages, enum zone_type zt, zone_last = ZONE_NORMAL; /* - * If we have HIGHMEM, node_states[N_NORMAL_MEMORY] contains nodes - * which have 0...ZONE_NORMAL, set zone_last to ZONE_NORMAL. + * If we have HIGHMEM or movable node, node_states[N_NORMAL_MEMORY] + * contains nodes which have zones of 0...ZONE_NORMAL, + * set zone_last to ZONE_NORMAL. * - * If we don't have HIGHMEM, node_states[N_NORMAL_MEMORY] contains nodes - * which have 0...ZONE_MOVABLE, set zone_last to ZONE_MOVABLE. + * If we don't have HIGHMEM nor movable node, + * node_states[N_NORMAL_MEMORY] contains nodes which have zones of + * 0...ZONE_MOVABLE, set zone_last to ZONE_MOVABLE. */ - if (N_HIGH_MEMORY == N_NORMAL_MEMORY) + if (N_MEMORY == N_NORMAL_MEMORY) zone_last = ZONE_MOVABLE; /* @@ -1122,6 +1151,30 @@ static void node_states_check_changes_offline(unsigned long nr_pages, else arg->status_change_nid_normal = -1; +#ifdef CONFIG_HIGHMEM + /* + * If we have movable node, node_states[N_HIGH_MEMORY] + * contains nodes which have zones of 0...ZONE_HIGHMEM, + * set zone_last to ZONE_HIGHMEM. + * + * If we don't have movable node, node_states[N_NORMAL_MEMORY] + * contains nodes which have zones of 0...ZONE_MOVABLE, + * set zone_last to ZONE_MOVABLE. + */ + zone_last = ZONE_HIGHMEM; + if (N_MEMORY == N_HIGH_MEMORY) + zone_last = ZONE_MOVABLE; + + for (; zt <= zone_last; zt++) + present_pages += pgdat->node_zones[zt].present_pages; + if (zone_idx(zone) <= zone_last && nr_pages >= present_pages) + arg->status_change_nid_high = zone_to_nid(zone); + else + arg->status_change_nid_high = -1; +#else + arg->status_change_nid_high = arg->status_change_nid_normal; +#endif + /* * node_states[N_HIGH_MEMORY] contains nodes which have 0...ZONE_MOVABLE */ @@ -1146,9 +1199,13 @@ static void node_states_clear_node(int node, struct memory_notify *arg) if (arg->status_change_nid_normal >= 0) node_clear_state(node, N_NORMAL_MEMORY); - if ((N_HIGH_MEMORY != N_NORMAL_MEMORY) && - (arg->status_change_nid >= 0)) + if ((N_MEMORY != N_NORMAL_MEMORY) && + (arg->status_change_nid_high >= 0)) node_clear_state(node, N_HIGH_MEMORY); + + if ((N_MEMORY != N_HIGH_MEMORY) && + (arg->status_change_nid >= 0)) + node_clear_state(node, N_MEMORY); } static int __ref __offline_pages(unsigned long start_pfn, -- 2.20.1