The patch titled
Remove unnecessary check for MIGRATE_RESERVE during boot
has been removed from the -mm tree. Its filename was
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks-tidy-fix.patch
This patch was dropped because it was folded into bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
------------------------------------------------------
Subject: Remove unnecessary check for MIGRATE_RESERVE during boot
From: Mel Gorman <mel@xxxxxxxxx>
At boot time, a number of MAX_ORDER_NR_PAGES get marked MIGRATE_RESERVE and
the remainder get marked MIGRATE_MOVABLE. The blocks are marked MOVABLE in
memmap_init_zone() before any blocks are marked reserve. A check is made in
memmap_init_zone() for (get_pageblock_migratetype(page) != MIGRATE_RESERVE)
which is a waste of time because the reserve has not been set yet. This
oversight was because an early version of the MIGRATE_RESERVE patch set blocks
MIGRATE_RESERVE earlier. This patch gets rid of the redundant check.
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Acked-by: Andy Whitcroft <apw@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff -puN mm/page_alloc.c~bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks-tidy-fix mm/page_alloc.c
--- a/mm/page_alloc.c~bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks-tidy-fix
+++ a/mm/page_alloc.c
@@ -2367,8 +2367,7 @@ void __meminit memmap_init_zone(unsigned
* the start are marked MIGRATE_RESERVE by
* setup_zone_migrate_reserve()
*/
- if ((pfn & (MAX_ORDER_NR_PAGES-1)) == 0 &&
- get_pageblock_migratetype(page) != MIGRATE_RESERVE)
+ if ((pfn & (MAX_ORDER_NR_PAGES-1)))
set_pageblock_migratetype(page, MIGRATE_MOVABLE);
INIT_LIST_HEAD(&page->lru);
_
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
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
group-short-lived-and-reclaimable-kernel-allocations.patch
group-high-order-atomic-allocations.patch
do-not-group-pages-by-mobility-type-on-low-memory-systems.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
handle-kernelcore=-boot-parameter-in-common-code-to-avoid-boot-problem-on-ia64.patch
lumpy-reclaim-v4.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-fix.patch
remove-page_group_by_mobility.patch
dont-group-high-order-atomic-allocations.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
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
