X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=mm%2Fnommu.c;h=c576df71e3bbd1b3f0527bb69b8d778daf20af9b;hb=242898be7a1921f646ca529ddc26d7337c69922f;hp=db45efac17cc218e390dd4a8b6d8366219c546a3;hpb=2e9abdd9bad485970b37cd53a82f92702054984c;p=powerpc.git

diff --git a/mm/nommu.c b/mm/nommu.c
index db45efac17..c576df71e3 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1070,6 +1070,7 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 	vma->vm_start = vma->vm_pgoff << PAGE_SHIFT;
 	return 0;
 }
+EXPORT_SYMBOL(remap_pfn_range);
 
 void swap_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
 {
@@ -1090,6 +1091,7 @@ void unmap_mapping_range(struct address_space *mapping,
 			 int even_cows)
 {
 }
+EXPORT_SYMBOL(unmap_mapping_range);
 
 /*
  * Check that a process has enough memory to allocate a new virtual
@@ -1122,7 +1124,7 @@ int __vm_enough_memory(long pages, int cap_sys_admin)
 	if (sysctl_overcommit_memory == OVERCOMMIT_GUESS) {
 		unsigned long n;
 
-		free = get_page_cache_size();
+		free = global_page_state(NR_FILE_PAGES);
 		free += nr_swap_pages;
 
 		/*
@@ -1147,14 +1149,26 @@ int __vm_enough_memory(long pages, int cap_sys_admin)
 		 * only call if we're about to fail.
 		 */
 		n = nr_free_pages();
+
+		/*
+		 * Leave reserved pages. The pages are not for anonymous pages.
+		 */
+		if (n <= totalreserve_pages)
+			goto error;
+		else
+			n -= totalreserve_pages;
+
+		/*
+		 * Leave the last 3% for root
+		 */
 		if (!cap_sys_admin)
 			n -= n / 32;
 		free += n;
 
 		if (free > pages)
 			return 0;
-		vm_unacct_memory(pages);
-		return -ENOMEM;
+
+		goto error;
 	}
 
 	allowed = totalram_pages * sysctl_overcommit_ratio / 100;
@@ -1175,7 +1189,7 @@ int __vm_enough_memory(long pages, int cap_sys_admin)
 	 */
 	if (atomic_read(&vm_committed_space) < (long)allowed)
 		return 0;
-
+error:
 	vm_unacct_memory(pages);
 
 	return -ENOMEM;