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-rw-r--r--mm/util.c51
1 files changed, 5 insertions, 46 deletions
diff --git a/mm/util.c b/mm/util.c
index 05a464929b3e..e2e4f8c3fa12 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -652,7 +652,7 @@ EXPORT_SYMBOL_GPL(vm_memory_committed);
*/
int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
{
- long free, allowed, reserve;
+ long allowed;
VM_WARN_ONCE(percpu_counter_read(&vm_committed_as) <
-(s64)vm_committed_as_batch * num_online_cpus(),
@@ -667,51 +667,9 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
return 0;
if (sysctl_overcommit_memory == OVERCOMMIT_GUESS) {
- free = global_zone_page_state(NR_FREE_PAGES);
- free += global_node_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_node_page_state(NR_SHMEM);
-
- free += get_nr_swap_pages();
-
- /*
- * Any slabs which are created with the
- * SLAB_RECLAIM_ACCOUNT flag claim to have contents
- * which are reclaimable, under pressure. The dentry
- * cache and most inode caches should fall into this
- */
- free += global_node_page_state(NR_SLAB_RECLAIMABLE);
-
- /*
- * Part of the kernel memory, which can be released
- * under memory pressure.
- */
- free += global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE);
-
- /*
- * Leave reserved pages. The pages are not for anonymous pages.
- */
- if (free <= totalreserve_pages)
+ if (pages > totalram_pages() + total_swap_pages)
goto error;
- else
- free -= totalreserve_pages;
-
- /*
- * Reserve some for root
- */
- if (!cap_sys_admin)
- free -= sysctl_admin_reserve_kbytes >> (PAGE_SHIFT - 10);
-
- if (free > pages)
- return 0;
-
- goto error;
+ return 0;
}
allowed = vm_commit_limit();
@@ -725,7 +683,8 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
* Don't let a single process grow so big a user can't recover
*/
if (mm) {
- reserve = sysctl_user_reserve_kbytes >> (PAGE_SHIFT - 10);
+ long reserve = sysctl_user_reserve_kbytes >> (PAGE_SHIFT - 10);
+
allowed -= min_t(long, mm->total_vm / 32, reserve);
}