From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Now, all reserved pages for CMA region are belong to the ZONE_CMA
and it only serves for GFP_HIGHUSER_MOVABLE. Therefore, we don't need to
consider ALLOC_CMA at all.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
---
mm/internal.h | 3 +--
mm/page_alloc.c | 27 +++------------------------
2 files changed, 4 insertions(+), 26 deletions(-)
diff --git a/mm/internal.h b/mm/internal.h
index 4c37234..04b75d6 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -468,8 +468,7 @@ unsigned long reclaim_clean_pages_from_list(struct zone *zone,
#define ALLOC_HARDER 0x10 /* try to alloc harder */
#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
-#define ALLOC_CMA 0x80 /* allow allocations from CMA areas */
-#define ALLOC_FAIR 0x100 /* fair zone allocation */
+#define ALLOC_FAIR 0x80 /* fair zone allocation */
enum ttu_flags;
struct tlbflush_unmap_batch;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 796b271..bab3698 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2798,12 +2798,6 @@ bool __zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
else
min -= min / 4;
-#ifdef CONFIG_CMA
- /* If allocation can't use CMA areas don't use free CMA pages */
- if (!(alloc_flags & ALLOC_CMA))
- free_pages -= zone_page_state(z, NR_FREE_CMA_PAGES);
-#endif
-
/*
* Check watermarks for an order-0 allocation request. If these
* are not met, then a high-order request also cannot go ahead
@@ -2833,10 +2827,8 @@ bool __zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
}
#ifdef CONFIG_CMA
- if ((alloc_flags & ALLOC_CMA) &&
- !list_empty(&area->free_list[MIGRATE_CMA])) {
+ if (!list_empty(&area->free_list[MIGRATE_CMA]))
return true;
- }
#endif
}
return false;
@@ -2853,13 +2845,6 @@ static inline bool zone_watermark_fast(struct zone *z, unsigned int order,
unsigned long mark, int classzone_idx, unsigned int alloc_flags)
{
long free_pages = zone_page_state(z, NR_FREE_PAGES);
- long cma_pages = 0;
-
-#ifdef CONFIG_CMA
- /* If allocation can't use CMA areas don't use free CMA pages */
- if (!(alloc_flags & ALLOC_CMA))
- cma_pages = zone_page_state(z, NR_FREE_CMA_PAGES);
-#endif
/*
* Fast check for order-0 only. If this fails then the reserves
@@ -2868,7 +2853,7 @@ static inline bool zone_watermark_fast(struct zone *z, unsigned int order,
* the caller is !atomic then it'll uselessly search the free
* list. That corner case is then slower but it is harmless.
*/
- if (!order && (free_pages - cma_pages) > mark + z->lowmem_reserve[classzone_idx])
+ if (!order && free_pages > mark + z->lowmem_reserve[classzone_idx])
return true;
return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
@@ -3475,10 +3460,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
unlikely(test_thread_flag(TIF_MEMDIE))))
alloc_flags |= ALLOC_NO_WATERMARKS;
}
-#ifdef CONFIG_CMA
- if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
- alloc_flags |= ALLOC_CMA;
-#endif
+
return alloc_flags;
}
@@ -3833,9 +3815,6 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
if (unlikely(!zonelist->_zonerefs->zone))
return NULL;
- if (IS_ENABLED(CONFIG_CMA) && ac.migratetype == MIGRATE_MOVABLE)
- alloc_flags |= ALLOC_CMA;
-
retry_cpuset:
cpuset_mems_cookie = read_mems_allowed_begin();
--
1.9.1
--
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