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authorVlastimil Babka <vbabka@suse.cz>2016-03-17 14:18:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 15:09:34 -0700
commite888ca3545dc6823603b976e40b62af2c68b6fcc (patch)
tree7c7fbc657586aa9af765f59ca6357704156a26d3 /mm/memory_hotplug.c
parent698b1b30642f1ff0ea10ef1de9745ab633031377 (diff)
downloadlwn-e888ca3545dc6823603b976e40b62af2c68b6fcc.tar.gz
lwn-e888ca3545dc6823603b976e40b62af2c68b6fcc.zip
mm, memory hotplug: small cleanup in online_pages()
We can reuse the nid we've determined instead of repeated pfn_to_nid() usages. Also zone_to_nid() should be a bit cheaper in general than pfn_to_nid(). Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Rik van Riel <riel@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: David Rientjes <rientjes@google.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory_hotplug.c')
-rw-r--r--mm/memory_hotplug.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index d9bcb26fc4df..c832ef3565cc 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1055,7 +1055,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
arg.nr_pages = nr_pages;
node_states_check_changes_online(nr_pages, zone, &arg);
- nid = pfn_to_nid(pfn);
+ nid = zone_to_nid(zone);
ret = memory_notify(MEM_GOING_ONLINE, &arg);
ret = notifier_to_errno(ret);
@@ -1095,7 +1095,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
pgdat_resize_unlock(zone->zone_pgdat, &flags);
if (onlined_pages) {
- node_states_set_node(zone_to_nid(zone), &arg);
+ node_states_set_node(nid, &arg);
if (need_zonelists_rebuild)
build_all_zonelists(NULL, NULL);
else
@@ -1107,7 +1107,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
init_per_zone_wmark_min();
if (onlined_pages) {
- kswapd_run(zone_to_nid(zone));
+ kswapd_run(nid);
kcompactd_run(nid);
}