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authorXishi Qiu <qiuxishi@huawei.com>2015-09-09 00:04:16 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-09 00:35:28 +0200
commitb5685e9263a6f3a8da546b8a46382f18a63745c9 (patch)
tree139e231735e2c6d758029f6888e315b837be5328 /mm
parentmm/page_alloc.c: change sysctl_lower_zone_reserve_ratio to sysctl_lowmem_rese... (diff)
downloadlinux-b5685e9263a6f3a8da546b8a46382f18a63745c9.tar.xz
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memory-hotplug: fix comments in zone_spanned_pages_in_node() and zone_spanned_pages_in_node()
When hot adding a node from add_memory(), we will add memblock first, so the node is not empty. But when called from cpu_up(), the node should be empty. Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Taku Izumi <izumi.taku@jp.fujitsu.com>\ Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5e8e99dd595a..b0fda2b9ca76 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5085,7 +5085,7 @@ static unsigned long __meminit zone_spanned_pages_in_node(int nid,
{
unsigned long zone_start_pfn, zone_end_pfn;
- /* When hotadd a new node, the node should be empty */
+ /* When hotadd a new node from cpu_up(), the node should be empty */
if (!node_start_pfn && !node_end_pfn)
return 0;
@@ -5152,7 +5152,7 @@ static unsigned long __meminit zone_absent_pages_in_node(int nid,
unsigned long zone_high = arch_zone_highest_possible_pfn[zone_type];
unsigned long zone_start_pfn, zone_end_pfn;
- /* When hotadd a new node, the node should be empty */
+ /* When hotadd a new node from cpu_up(), the node should be empty */
if (!node_start_pfn && !node_end_pfn)
return 0;