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| author |   Oscar Salvador <osalvador@suse.de> | 2018-10-26 15:07:25 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 16:26:33 -0700 |
| commit | 83d83612d707c3709e030c745e3df8d4e17bbfa2 (patch) | |
| tree | a429c3d7a11d9fe0ba99934faa7fb3f4608a3de1 /mm/memory_hotplug.c | |
| parent | mm/filemap.c: Use existing variable (diff) | |
| download | linux-dev-83d83612d707c3709e030c745e3df8d4e17bbfa2.tar.xz linux-dev-83d83612d707c3709e030c745e3df8d4e17bbfa2.zip | |
mm/memory_hotplug.c: spare unnecessary calls to node_set_state
In node_states_check_changes_online, we check if the node will have to be
set for any of the N_*_MEMORY states after the pages have been onlined.
Later on, we perform the activation in node_states_set_node. Currently,
in node_states_set_node we set the node to N_MEMORY unconditionally.
This means that we call node_set_state for N_MEMORY every time pages go
online, but we only need to do it if the node has not yet been set for
N_MEMORY.
Fix this by checking status_change_nid.
Link: http://lkml.kernel.org/r/20180919100819.25518-2-osalvador@techadventures.net
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Pavel Tatashin <pavel.tatashin@microsoft.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <yasu.isimatu@gmail.com>
Cc: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | mm/memory_hotplug.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 38d94b703e9d..63facfc57224 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -753,7 +753,8 @@ static void node_states_set_node(int node, struct memory_notify *arg) if (arg->status_change_nid_high >= 0) node_set_state(node, N_HIGH_MEMORY); - node_set_state(node, N_MEMORY); + if (arg->status_change_nid >= 0) + node_set_state(node, N_MEMORY); } static void __meminit resize_zone_range(struct zone *zone, unsigned long start_pfn, |