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ANDROID: Define/use MIGRATE_FALLBACKS

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MIGRATE_PCPTYPES is used for two different purposes - one to specify
number of migrate types with PCP lists (as its name implies) and
the other as number of migrate-types that have fallbacks.

Rather than overload MIGRATE_PCPTYPES, define and use a second value,
MIGRATE_FALLBACKS to keep track of number of fallbacks. This would
be useful if we add items to one list but not the other (a follow on
patch will add MIGRATE_CMA to the pcp list but not to the fallbacks).

Bug: 330201547
Change-Id: Ife0af3a66f8d4fd12ca3642eea606076da3f7046
Suggested-by: Chris Goldsworthy <quic_cgoldswo@quicinc.com>
Signed-off-by: Sukadev Bhattiprolu <quic_sukadev@quicinc.com>
This commit is contained in:
Sukadev Bhattiprolu
2024-02-25 18:25:23 -08:00
committed by Treehugger Robot
parent ec9e469a80
commit ba3f556955
3 changed files with 9 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/mmzone.h
+5 -2
View File
@@ -49,7 +49,10 @@ enum migratetype {
MIGRATE_UNMOVABLE,
MIGRATE_MOVABLE,
MIGRATE_RECLAIMABLE,
MIGRATE_PCPTYPES, /* the number of types on the pcp lists */
/* the number of types that have fallbacks */
MIGRATE_FALLBACKS,
/* the number of types on the pcp lists */
MIGRATE_PCPTYPES = MIGRATE_FALLBACKS,
MIGRATE_HIGHATOMIC = MIGRATE_PCPTYPES,
#ifdef CONFIG_CMA
/*
@@ -97,7 +100,7 @@ static inline bool is_migrate_movable(int mt)
*/
static inline bool migratetype_is_mergeable(int mt)
{
return mt < MIGRATE_PCPTYPES;
return mt < MIGRATE_FALLBACKS;
}
#define for_each_migratetype_order(order, type) \
mm/khugepaged.c
+1 -1
View File
@@ -2613,7 +2613,7 @@ static void set_recommended_min_free_kbytes(void)
* MIGRATE_TYPES we care about.
*/
recommended_min += pageblock_nr_pages * nr_zones *
MIGRATE_PCPTYPES * MIGRATE_PCPTYPES;
MIGRATE_FALLBACKS * MIGRATE_FALLBACKS;
/* don't ever allow to reserve more than 5% of the lowmem */
recommended_min = min(recommended_min,
mm/page_alloc.c
+3 -3
View File
@@ -424,7 +424,7 @@ void set_pfnblock_flags_mask(struct page *page, unsigned long flags,
void set_pageblock_migratetype(struct page *page, int migratetype)
{
if (unlikely(page_group_by_mobility_disabled &&
migratetype < MIGRATE_PCPTYPES))
migratetype < MIGRATE_FALLBACKS))
migratetype = MIGRATE_UNMOVABLE;
set_pfnblock_flags_mask(page, (unsigned long)migratetype,
@@ -1631,7 +1631,7 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
*
* The other migratetypes do not have fallbacks.
*/
static int fallbacks[MIGRATE_PCPTYPES][MIGRATE_PCPTYPES - 1] = {
static int fallbacks[MIGRATE_PCPTYPES][MIGRATE_FALLBACKS - 1] = {
[MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE },
[MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE },
[MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE },
@@ -2022,7 +2022,7 @@ int find_suitable_fallback(struct free_area *area, unsigned int order,
return -1;
*can_steal = false;
for (i = 0; i < MIGRATE_PCPTYPES - 1 ; i++) {
for (i = 0; i < MIGRATE_FALLBACKS - 1 ; i++) {
fallback_mt = fallbacks[migratetype][i];
if (free_area_empty(area, fallback_mt))
continue;