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authorYasunori Goto <y-goto@jp.fujitsu.com>2006-05-30 21:25:42 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-31 16:27:10 -0700
commit25a6df952542ad9f284421b6ffe28f3eb3df1305 (patch)
tree8b0649ff83f5455fcca4f255bf2189a5cbf81fc8 /mm
parent[PATCH] fbcon: fix scrollback with logo issue immediately after boot (diff)
downloadlinux-dev-25a6df952542ad9f284421b6ffe28f3eb3df1305.tar.xz
linux-dev-25a6df952542ad9f284421b6ffe28f3eb3df1305.zip
[PATCH] spanned_pages is not updated at a case of memory hot-add
From: Yasunori Goto <y-goto@jp.fujitsu.com> If hot-added memory's address is smaller than old area, spanned_pages will not be updated. It must be fixed. example) Old zone_start_pfn = 0x60000, and spanned_pages = 0x10000 Added new memory's start_pfn = 0x50000, and end_pfn = 0x60000 new spanned_pages will be still 0x10000 by old code. (It should be updated to 0x20000.) Because old_zone_end_pfn will be 0x70000, and end_pfn smaller than it. So, spanned_pages will not be updated. In current code, spanned_pages is updated only when end_pfn is updated. But, it should be updated by subtraction between bigger end_pfn and new zone_start_pfn. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memory_hotplug.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 1ae2b2cc3a54..70df5c0d957e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -91,8 +91,8 @@ static void grow_zone_span(struct zone *zone,
if (start_pfn < zone->zone_start_pfn)
zone->zone_start_pfn = start_pfn;
- if (end_pfn > old_zone_end_pfn)
- zone->spanned_pages = end_pfn - zone->zone_start_pfn;
+ zone->spanned_pages = max(old_zone_end_pfn, end_pfn) -
+ zone->zone_start_pfn;
zone_span_writeunlock(zone);
}
@@ -106,8 +106,8 @@ static void grow_pgdat_span(struct pglist_data *pgdat,
if (start_pfn < pgdat->node_start_pfn)
pgdat->node_start_pfn = start_pfn;
- if (end_pfn > old_pgdat_end_pfn)
- pgdat->node_spanned_pages = end_pfn - pgdat->node_start_pfn;
+ pgdat->node_spanned_pages = max(old_pgdat_end_pfn, end_pfn) -
+ pgdat->node_start_pfn;
}
int online_pages(unsigned long pfn, unsigned long nr_pages)