X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fnommu.c;h=4358032566e950f25812fef04fa951dcc39f6795;hb=6581058f44533f9d45548bcfe986c125376859e9;hp=5c5c2d4b1807d4677765cac99f39c2af646c097d;hpb=d3ec4844d449cf7af9e749f73ba2052fb7b72fc2;p=pandora-kernel.git

diff --git a/mm/nommu.c b/mm/nommu.c
index 5c5c2d4b1807..4358032566e9 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1884,9 +1884,17 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
 		return 0;
 
 	if (sysctl_overcommit_memory == OVERCOMMIT_GUESS) {
-		unsigned long n;
+		free = global_page_state(NR_FREE_PAGES);
+		free += global_page_state(NR_FILE_PAGES);
+
+		/*
+		 * shmem pages shouldn't be counted as free in this
+		 * case, they can't be purged, only swapped out, and
+		 * that won't affect the overall amount of available
+		 * memory in the system.
+		 */
+		free -= global_page_state(NR_SHMEM);
 
-		free = global_page_state(NR_FILE_PAGES);
 		free += nr_swap_pages;
 
 		/*
@@ -1897,35 +1905,19 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
 		 */
 		free += global_page_state(NR_SLAB_RECLAIMABLE);
 
-		/*
-		 * Leave the last 3% for root
-		 */
-		if (!cap_sys_admin)
-			free -= free / 32;
-
-		if (free > pages)
-			return 0;
-
-		/*
-		 * nr_free_pages() is very expensive on large systems,
-		 * 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)
+		if (free <= totalreserve_pages)
 			goto error;
 		else
-			n -= totalreserve_pages;
+			free -= totalreserve_pages;
 
 		/*
 		 * Leave the last 3% for root
 		 */
 		if (!cap_sys_admin)
-			n -= n / 32;
-		free += n;
+			free -= free / 32;
 
 		if (free > pages)
 			return 0;