diff options
| -rw-r--r-- | mm/util.c | 51 |
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); } |