The patch titled
Do not cross section boundary when moving pages between mobility lists
has been added to the -mm tree. Its filename is
move-free-pages-between-lists-on-steal-do-not-cross-section-boundary-when-moving-pages-between-mobility-lists.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Do not cross section boundary when moving pages between mobility lists
From: Mel Gorman <mel@xxxxxxxxx>
move-free-pages-between-lists-on-steal-fix-2.patch fixed an issue with a
BUG_ON() that checked for a page just outside a MAX_ORDER_NR_PAGES
boundary. In fact, the proper place to check it was earlier. A situation
can occur on SPARSEMEM where a section boundary is crossed which will cause
problems on some machines. This patch addresses the problem.
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Acked-by: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff -puN mm/page_alloc.c~move-free-pages-between-lists-on-steal-do-not-cross-section-boundary-when-moving-pages-between-mobility-lists mm/page_alloc.c
--- a/mm/page_alloc.c~move-free-pages-between-lists-on-steal-do-not-cross-section-boundary-when-moving-pages-between-mobility-lists
+++ a/mm/page_alloc.c
@@ -681,10 +681,10 @@ int move_freepages(struct zone *zone,
* Remove at a later date when no bug reports exist related to
* CONFIG_PAGE_GROUP_BY_MOBILITY
*/
- BUG_ON(page_zone(start_page) != page_zone(end_page - 1));
+ BUG_ON(page_zone(start_page) != page_zone(end_page));
#endif
- for (page = start_page; page < end_page;) {
+ for (page = start_page; page <= end_page;) {
#ifdef CONFIG_HOLES_IN_ZONE
if (!pfn_valid(page_to_pfn(page))) {
page++;
@@ -716,8 +716,8 @@ int move_freepages_block(struct zone *zo
start_pfn = page_to_pfn(page);
start_pfn = start_pfn & ~(MAX_ORDER_NR_PAGES-1);
start_page = pfn_to_page(start_pfn);
- end_page = start_page + MAX_ORDER_NR_PAGES;
- end_pfn = start_pfn + MAX_ORDER_NR_PAGES;
+ end_page = start_page + MAX_ORDER_NR_PAGES - 1;
+ end_pfn = start_pfn + MAX_ORDER_NR_PAGES - 1;
/* Do not cross zone boundaries */
if (start_pfn < zone->zone_start_pfn)
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
add-a-bitmap-that-is-used-to-track-flags-affecting-a-block-of-pages.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated-fix.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-low-memory-that-may-be-migrated.patch
split-the-free-lists-for-movable-and-unmovable-allocations.patch
choose-pages-from-the-per-cpu-list-based-on-migration-type.patch
add-a-configure-option-to-group-pages-by-mobility.patch
drain-per-cpu-lists-when-high-order-allocations-fail.patch
move-free-pages-between-lists-on-steal.patch
move-free-pages-between-lists-on-steal-fix.patch
move-free-pages-between-lists-on-steal-fix-2.patch
move-free-pages-between-lists-on-steal-avoid-unsafe-use-of-struct-pages-in-move_freepages-when-config_holes_in_zone-is-set.patch
move-free-pages-between-lists-on-steal-do-not-cross-section-boundary-when-moving-pages-between-mobility-lists.patch
group-short-lived-and-reclaimable-kernel-allocations.patch
group-high-order-atomic-allocations.patch
bias-the-placement-of-kernel-pages-at-lower-pfns.patch
be-more-agressive-about-stealing-when-migrate_reclaimable-allocations-fallback.patch
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2.patch
create-the-zone_movable-zone.patch
allow-huge-page-allocations-to-use-gfp_high_movable.patch
x86-specify-amount-of-kernel-memory-at-boot-time.patch
ppc-and-powerpc-specify-amount-of-kernel-memory-at-boot-time.patch
x86_64-specify-amount-of-kernel-memory-at-boot-time.patch
ia64-specify-amount-of-kernel-memory-at-boot-time.patch
add-documentation-for-additional-boot-parameter-and-sysctl.patch
lumpy-reclaim-v4.patch
lumpy-back-out-removal-of-active-check-in-isolate_lru_pages.patch
lumpy-only-count-taken-pages-as-scanned.patch
add-pfn_valid_within-helper-for-sub-max_order-hole-detection.patch
anti-fragmentation-switch-over-to-pfn_valid_within.patch
lumpy-move-to-using-pfn_valid_within.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks-tidy.patch
do-not-disable-interrupts-when-reading-min_free_kbytes.patch
ext2-reservations.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated-swap-prefetch.patch
add-debugging-aid-for-memory-initialisation-problems.patch
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