Revert "android/lowmemorykiller: Only consider gfp_mask free pages"
This change is not needed anymore due to a new and improved change to the
android low memory killer that is incompatible with this change. To be able
to apply the new change this change needs to be removed.
This reverts commit cc4baf70665f54305182bfaf98c6236d129e6dad.
Change-Id: I33801faf9ac7371f46cf409009939d853adee95e
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
diff --git a/drivers/staging/android/lowmemorykiller.c b/drivers/staging/android/lowmemorykiller.c
index 71554ed..9b2f554 100644
--- a/drivers/staging/android/lowmemorykiller.c
+++ b/drivers/staging/android/lowmemorykiller.c
@@ -64,60 +64,6 @@
printk(x); \
} while (0)
-
-static int can_use_cma_pages(struct zone *zone, gfp_t gfp_mask)
-{
- int can_use = 0;
- int mtype = allocflags_to_migratetype(gfp_mask);
- int i = 0;
- int *mtype_fallbacks = get_migratetype_fallbacks(mtype);
-
- if (is_migrate_cma(mtype)) {
- can_use = 1;
- } else {
- for (i = 0;; i++) {
- int fallbacktype = mtype_fallbacks[i];
-
- if (is_migrate_cma(fallbacktype)) {
- can_use = 1;
- break;
- }
-
- if (fallbacktype == MIGRATE_RESERVE)
- break;
- }
- }
- return can_use;
-}
-
-
-static int nr_free_zone_pages(struct zone *zone, gfp_t gfp_mask)
-{
- int sum = zone_page_state(zone, NR_FREE_PAGES);
-
- if (!can_use_cma_pages(zone, gfp_mask))
- sum -= zone_page_state(zone, NR_FREE_CMA_PAGES);
-
- return sum;
-}
-
-
-static int nr_free_pages(gfp_t gfp_mask)
-{
- struct zoneref *z;
- struct zone *zone;
- int sum = 0;
-
- struct zonelist *zonelist = node_zonelist(numa_node_id(), gfp_mask);
-
- for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
- sum += nr_free_zone_pages(zone, gfp_mask);
- }
-
- return sum;
-}
-
-
static int test_task_flag(struct task_struct *p, int flag)
{
struct task_struct *t = p;
@@ -160,15 +106,6 @@
other_file = global_page_state(NR_FILE_PAGES) -
global_page_state(NR_SHMEM);
- if (nr_to_scan > 0 && other_free > other_file) {
- /*
- * If the number of free pages is going to affect the decision
- * of which process is selected then ensure only free pages
- * which can satisfy the request are considered.
- */
- other_free = nr_free_pages(sc->gfp_mask);
- }
-
if (lowmem_adj_size < array_size)
array_size = lowmem_adj_size;
if (lowmem_minfree_size < array_size)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ca7a586..5dc65bd 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -61,14 +61,6 @@
MIGRATE_TYPES
};
-/*
- * Returns a list which contains the migrate types on to which
- * an allocation falls back when the free list for the migrate
- * type mtype is depleted.
- * The end of the list is delimited by the type MIGRATE_RESERVE.
- */
-extern int *get_migratetype_fallbacks(int mtype);
-
#ifdef CONFIG_CMA
bool is_cma_pageblock(struct page *page);
# define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d6dd07a..b179e71 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -926,11 +926,6 @@
[MIGRATE_ISOLATE] = { MIGRATE_RESERVE }, /* Never used */
};
-int *get_migratetype_fallbacks(int mtype)
-{
- return fallbacks[mtype];
-}
-
/*
* Move the free pages in a range to the free lists of the requested type.
* Note that start_page and end_pages are not aligned on a pageblock