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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2007-11-14 16:59:12 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-14 18:45:38 -0800
commitdbc0e4cefd003834440fe7ac5464616c5235cb94 (patch)
tree8c64dd88783239a360b937315b3109276b7f193a
parent3ad33b2436b545cbe8b28e53f3710432cad457ab (diff)
downloadop-kernel-dev-dbc0e4cefd003834440fe7ac5464616c5235cb94.zip
op-kernel-dev-dbc0e4cefd003834440fe7ac5464616c5235cb94.tar.gz
memory hotremove: unset migrate type "ISOLATE" after removal
We should unset migrate type "ISOLATE" when we successfully removed memory. But current code has BUG and cannot works well. This patch also includes bugfix? to change get_pageblock_flags to get_pageblock_migratetype(). Thanks to Badari Pulavarty for finding this. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/memory_hotplug.c4
-rw-r--r--mm/page_isolation.c6
2 files changed, 5 insertions, 5 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 3a47871..987abe6 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -574,8 +574,8 @@ repeat:
/* Ok, all of our target is islaoted.
We cannot do rollback at this point. */
offline_isolated_pages(start_pfn, end_pfn);
- /* reset pagetype flags */
- start_isolate_page_range(start_pfn, end_pfn);
+ /* reset pagetype flags and makes migrate type to be MOVABLE */
+ undo_isolate_page_range(start_pfn, end_pfn);
/* removal success */
zone->present_pages -= offlined_pages;
zone->zone_pgdat->node_present_pages -= offlined_pages;
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 8f92a29..3444b58 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -55,7 +55,7 @@ start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn)
return 0;
undo:
for (pfn = start_pfn;
- pfn <= undo_pfn;
+ pfn < undo_pfn;
pfn += pageblock_nr_pages)
unset_migratetype_isolate(pfn_to_page(pfn));
@@ -76,7 +76,7 @@ undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn)
pfn < end_pfn;
pfn += pageblock_nr_pages) {
page = __first_valid_page(pfn, pageblock_nr_pages);
- if (!page || get_pageblock_flags(page) != MIGRATE_ISOLATE)
+ if (!page || get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
continue;
unset_migratetype_isolate(page);
}
@@ -126,7 +126,7 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
*/
for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) {
page = __first_valid_page(pfn, pageblock_nr_pages);
- if (page && get_pageblock_flags(page) != MIGRATE_ISOLATE)
+ if (page && get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
break;
}
if (pfn < end_pfn)
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