From: js1304@gmail.com
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
mgorman@techsingularity.net, Laura Abbott <lauraa@codeaurora.org>,
Minchan Kim <minchan@kernel.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Michal Nazarewicz <mina86@mina86.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: [PATCH v5 4/6] mm/cma: remove ALLOC_CMA
Date: Mon, 29 Aug 2016 14:07:33 +0900 [thread overview]
Message-ID: <1472447255-10584-5-git-send-email-iamjoonsoo.kim@lge.com> (raw)
In-Reply-To: <1472447255-10584-1-git-send-email-iamjoonsoo.kim@lge.com>
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
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.
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
mm/compaction.c | 4 +---
mm/internal.h | 1 -
mm/page_alloc.c | 28 +++-------------------------
3 files changed, 4 insertions(+), 29 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index 29f6c49..4532905 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1401,14 +1401,12 @@ static enum compact_result __compaction_suitable(struct zone *zone, int order,
* if compaction succeeds.
* For costly orders, we require low watermark instead of min for
* compaction to proceed to increase its chances.
- * ALLOC_CMA is used, as pages in CMA pageblocks are considered
- * suitable migration targets
*/
watermark = (order > PAGE_ALLOC_COSTLY_ORDER) ?
low_wmark_pages(zone) : min_wmark_pages(zone);
watermark += compact_gap(order);
if (!__zone_watermark_ok(zone, 0, watermark, classzone_idx,
- ALLOC_CMA, wmark_target))
+ 0, wmark_target))
return COMPACT_SKIPPED;
/*
diff --git a/mm/internal.h b/mm/internal.h
index 3d3f052..01d06bb 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -466,7 +466,6 @@ 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 */
enum ttu_flags;
struct tlbflush_unmap_batch;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 91fb172..16ba1fe 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2565,7 +2565,7 @@ int __isolate_free_page(struct page *page, unsigned int order)
* exists.
*/
watermark = min_wmark_pages(zone) + (1UL << order);
- if (!zone_watermark_ok(zone, 0, watermark, 0, ALLOC_CMA))
+ if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
return 0;
__mod_zone_freepage_state(zone, -(1UL << order), mt);
@@ -2808,12 +2808,6 @@ 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
@@ -2843,10 +2837,8 @@ 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;
@@ -2863,13 +2855,6 @@ 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
@@ -2878,7 +2863,7 @@ 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,
@@ -3355,10 +3340,6 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
} else if (unlikely(rt_task(current)) && !in_interrupt())
alloc_flags |= ALLOC_HARDER;
-#ifdef CONFIG_CMA
- if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
- alloc_flags |= ALLOC_CMA;
-#endif
return alloc_flags;
}
@@ -3727,9 +3708,6 @@ __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
next prev parent reply other threads:[~2016-08-29 5:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-29 5:07 [PATCH v5 0/6] Introduce ZONE_CMA js1304
2016-08-29 5:07 ` [PATCH v5 1/6] mm/page_alloc: don't reserve ZONE_HIGHMEM for ZONE_MOVABLE request js1304
2016-09-16 3:14 ` Aneesh Kumar K.V
2016-09-22 5:30 ` Joonsoo Kim
2016-09-21 9:06 ` Vlastimil Babka
2016-08-29 5:07 ` [PATCH v5 2/6] mm/cma: introduce new zone, ZONE_CMA js1304
2016-08-30 10:35 ` Aneesh Kumar K.V
2016-08-30 12:40 ` Aneesh Kumar K.V
2016-08-31 7:58 ` Joonsoo Kim
2016-09-21 9:11 ` Vlastimil Babka
2016-08-29 5:07 ` [PATCH v5 3/6] mm/cma: populate ZONE_CMA js1304
2016-09-21 9:20 ` Vlastimil Babka
2016-09-22 5:45 ` Joonsoo Kim
2016-09-22 6:50 ` Joonsoo Kim
2016-09-22 15:59 ` Vlastimil Babka
2016-09-28 5:34 ` Joonsoo Kim
2016-08-29 5:07 ` js1304 [this message]
2016-08-29 5:07 ` [PATCH v5 5/6] mm/cma: remove MIGRATE_CMA js1304
2016-08-29 5:07 ` [PATCH v5 6/6] mm/cma: remove per zone CMA stat js1304
2016-08-29 9:27 ` [PATCH v5 0/6] Introduce ZONE_CMA Aneesh Kumar K.V
2016-08-30 8:21 ` Joonsoo Kim
2016-08-30 10:39 ` Aneesh Kumar K.V
2016-08-31 8:03 ` Joonsoo Kim
2016-09-01 5:47 ` Aneesh Kumar K.V
2016-09-01 6:01 ` Joonsoo Kim
2016-09-21 14:47 ` Aneesh Kumar K.V
2016-09-22 5:32 ` Joonsoo Kim
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