The patch titled
Subject: mm/page_alloc: remove realsize in free_area_init_core()
has been added to the -mm tree. Its filename is
mm-page_alloc-remove-realsize-in-free_area_init_core.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-remove-realsize-in-free_area_init_core.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-remove-realsize-in-free_area_init_core.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/page_alloc: remove realsize in free_area_init_core()
Highmem's realsize always equals to freesize, so it is not necessary to
spare a variable to record this.
Link: http://lkml.kernel.org/r/20180413083859.65888-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff -puN mm/page_alloc.c~mm-page_alloc-remove-realsize-in-free_area_init_core mm/page_alloc.c
--- a/mm/page_alloc.c~mm-page_alloc-remove-realsize-in-free_area_init_core
+++ a/mm/page_alloc.c
@@ -6230,22 +6230,21 @@ static void __paginginit free_area_init_
for (j = 0; j < MAX_NR_ZONES; j++) {
struct zone *zone = pgdat->node_zones + j;
- unsigned long size, realsize, freesize, memmap_pages;
+ unsigned long size, freesize, memmap_pages;
unsigned long zone_start_pfn = zone->zone_start_pfn;
unsigned long movable_size = 0;
size = zone->spanned_pages;
- realsize = freesize = zone->present_pages;
+ freesize = zone->present_pages;
if (zone_end_pfn(zone) > node_end_pfn)
node_end_pfn = zone_end_pfn(zone);
-
/*
* Adjust freesize so that it accounts for how much memory
* is used by this zone for memmap. This affects the watermark
* and per-cpu initialisations
*/
- memmap_pages = calc_memmap_size(size, realsize);
+ memmap_pages = calc_memmap_size(size, freesize);
if (!is_highmem_idx(j)) {
if (freesize >= memmap_pages) {
freesize -= memmap_pages;
@@ -6277,7 +6276,7 @@ static void __paginginit free_area_init_
* when the bootmem allocator frees pages into the buddy system.
* And all highmem pages will be managed by the buddy system.
*/
- zone->managed_pages = is_highmem_idx(j) ? realsize : freesize;
+ zone->managed_pages = freesize;
#ifdef CONFIG_NUMA
zone->node = nid;
#endif
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-page_alloc-remove-realsize-in-free_area_init_core.patch
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