Subject: [merged] memory_hotplug-use-pgdat_resize_lock-in-__offline_pages.patch removed from -mm tree
To: cody@xxxxxxxxxxxxxxxxxx,rientjes@xxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 08 Jul 2013 12:25:12 -0700
The patch titled
Subject: memory_hotplug: use pgdat_resize_lock() in __offline_pages()
has been removed from the -mm tree. Its filename was
memory_hotplug-use-pgdat_resize_lock-in-__offline_pages.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
Subject: memory_hotplug: use pgdat_resize_lock() in __offline_pages()
mmzone.h documents node_size_lock (which pgdat_resize_lock() locks) as
follows:
* Must be held any time you expect node_start_pfn, node_present_pages
* or node_spanned_pages stay constant. [...]
So actually hold it when we update node_present_pages in __offline_pages().
[akpm@xxxxxxxxxxxxxxxxxxxx: fix build]
Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 5 +++++
1 file changed, 5 insertions(+)
diff -puN mm/memory_hotplug.c~memory_hotplug-use-pgdat_resize_lock-in-__offline_pages mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~memory_hotplug-use-pgdat_resize_lock-in-__offline_pages
+++ a/mm/memory_hotplug.c
@@ -1492,6 +1492,7 @@ static int __ref __offline_pages(unsigne
unsigned long pfn, nr_pages, expire;
long offlined_pages;
int ret, drain, retry_max, node;
+ unsigned long flags;
struct zone *zone;
struct memory_notify arg;
@@ -1585,7 +1586,11 @@ repeat:
/* removal success */
zone->managed_pages -= offlined_pages;
zone->present_pages -= offlined_pages;
+
+ pgdat_resize_lock(zone->zone_pgdat, &flags);
zone->zone_pgdat->node_present_pages -= offlined_pages;
+ pgdat_resize_unlock(zone->zone_pgdat, &flags);
+
totalram_pages -= offlined_pages;
init_per_zone_wmark_min();
_
Patches currently in -mm which might be from cody@xxxxxxxxxxxxxxxxxx are
origin.patch
zbud-add-to-mm.patch
zswap-add-to-mm.patch
zswap-add-documentation.patch
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