@@ -165,6 +165,7 @@ static char * const zone_names[MAX_NR_ZONES] = {
"Movable",
};
+static DEFINE_SPINLOCK(min_free_lock);
int min_free_kbytes = 1024;
static unsigned long __meminitdata nr_kernel_pages;
@@ -4839,13 +4840,13 @@ static void setup_per_zone_lowmem_reserve(void)
}
/**
- * setup_per_zone_wmarks - called when min_free_kbytes changes
+ * __setup_per_zone_wmarks - called when min_free_kbytes changes
* or when memory is hot-{added|removed}
*
* Ensures that the watermark[min,low,high] values for each zone are set
* correctly with respect to min_free_kbytes.
*/
-void setup_per_zone_wmarks(void)
+static void __setup_per_zone_wmarks(void)
{
unsigned long pages_min = min_free_kbytes >> (PAGE_SHIFT - 10);
unsigned long lowmem_pages = 0;
@@ -4943,6 +4944,15 @@ static void __init setup_per_zone_inactive_ratio(void)
calculate_zone_inactive_ratio(zone);
}
+void setup_per_zone_wmarks(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&min_free_lock, flags);
+ __setup_per_zone_wmarks();
+ spin_unlock_irqrestore(&min_free_lock, flags);
+}
+
/*
* Initialise min_free_kbytes.
*
@@ -4978,7 +4988,7 @@ static int __init init_per_zone_wmark_min(void)
min_free_kbytes = 128;
if (min_free_kbytes > 65536)
min_free_kbytes = 65536;
- setup_per_zone_wmarks();
+ __setup_per_zone_wmarks();
setup_per_zone_lowmem_reserve();
setup_per_zone_inactive_ratio();
return 0;