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-rw-r--r--mm/page_alloc.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1731236dec3..b257720edfc 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -773,9 +773,12 @@ again:
}
#define ALLOC_NO_WATERMARKS 0x01 /* don't check watermarks at all */
-#define ALLOC_HARDER 0x02 /* try to alloc harder */
-#define ALLOC_HIGH 0x04 /* __GFP_HIGH set */
-#define ALLOC_CPUSET 0x08 /* check for correct cpuset */
+#define ALLOC_WMARK_MIN 0x02 /* use pages_min watermark */
+#define ALLOC_WMARK_LOW 0x04 /* use pages_low watermark */
+#define ALLOC_WMARK_HIGH 0x08 /* use pages_high watermark */
+#define ALLOC_HARDER 0x10 /* try to alloc harder */
+#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
+#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
/*
* Return 1 if free pages are above 'mark'. This takes into account the order
@@ -830,7 +833,14 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order,
continue;
if (!(alloc_flags & ALLOC_NO_WATERMARKS)) {
- if (!zone_watermark_ok(*z, order, (*z)->pages_low,
+ unsigned long mark;
+ if (alloc_flags & ALLOC_WMARK_MIN)
+ mark = (*z)->pages_min;
+ else if (alloc_flags & ALLOC_WMARK_LOW)
+ mark = (*z)->pages_low;
+ else
+ mark = (*z)->pages_high;
+ if (!zone_watermark_ok(*z, order, mark,
classzone_idx, alloc_flags))
continue;
}
@@ -871,7 +881,7 @@ restart:
}
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, order,
- zonelist, ALLOC_CPUSET);
+ zonelist, ALLOC_WMARK_LOW|ALLOC_CPUSET);
if (page)
goto got_pg;
@@ -888,7 +898,7 @@ restart:
* cannot run direct reclaim, or if the caller has realtime scheduling
* policy.
*/
- alloc_flags = 0;
+ alloc_flags = ALLOC_WMARK_MIN;
if ((unlikely(rt_task(p)) && !in_interrupt()) || !wait)
alloc_flags |= ALLOC_HARDER;
if (gfp_mask & __GFP_HIGH)
@@ -959,7 +969,7 @@ rebalance:
* under heavy pressure.
*/
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, order,
- zonelist, ALLOC_CPUSET);
+ zonelist, ALLOC_WMARK_HIGH|ALLOC_CPUSET);
if (page)
goto got_pg;