diff options
| -rw-r--r-- | fs/proc/meminfo.c | 5 | ||||
| -rw-r--r-- | include/linux/mman.h | 2 | ||||
| -rw-r--r-- | mm/mmap.c | 4 | ||||
| -rw-r--r-- | mm/nommu.c | 3 | ||||
| -rw-r--r-- | mm/util.c | 13 |
5 files changed, 18 insertions, 9 deletions
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 59d85d60889..c805d5b69ba 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -24,7 +24,6 @@ static int meminfo_proc_show(struct seq_file *m, void *v) { struct sysinfo i; unsigned long committed; - unsigned long allowed; struct vmalloc_info vmi; long cached; unsigned long pages[NR_LRU_LISTS]; @@ -37,8 +36,6 @@ static int meminfo_proc_show(struct seq_file *m, void *v) si_meminfo(&i); si_swapinfo(&i); committed = percpu_counter_read_positive(&vm_committed_as); - allowed = ((totalram_pages - hugetlb_total_pages()) - * sysctl_overcommit_ratio / 100) + total_swap_pages; cached = global_page_state(NR_FILE_PAGES) - total_swapcache_pages() - i.bufferram; @@ -147,7 +144,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) K(global_page_state(NR_UNSTABLE_NFS)), K(global_page_state(NR_BOUNCE)), K(global_page_state(NR_WRITEBACK_TEMP)), - K(allowed), + K(vm_commit_limit()), K(committed), (unsigned long)VMALLOC_TOTAL >> 10, vmi.used >> 10, diff --git a/include/linux/mman.h b/include/linux/mman.h index 92dc257251e..7f7f8dae4b1 100644 --- a/include/linux/mman.h +++ b/include/linux/mman.h @@ -87,4 +87,6 @@ calc_vm_flag_bits(unsigned long flags) _calc_vm_trans(flags, MAP_DENYWRITE, VM_DENYWRITE ) | _calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ); } + +unsigned long vm_commit_limit(void); #endif /* _LINUX_MMAN_H */ diff --git a/mm/mmap.c b/mm/mmap.c index 3d3e224be77..803048e9c56 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -179,14 +179,12 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin) goto error; } - allowed = (totalram_pages - hugetlb_total_pages()) - * sysctl_overcommit_ratio / 100; + allowed = vm_commit_limit(); /* * Reserve some for root */ if (!cap_sys_admin) allowed -= sysctl_admin_reserve_kbytes >> (PAGE_SHIFT - 10); - allowed += total_swap_pages; /* * Don't let a single process grow so big a user can't recover diff --git a/mm/nommu.c b/mm/nommu.c index ecd1f158548..d8a957bb9e3 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1948,13 +1948,12 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin) goto error; } - allowed = totalram_pages * sysctl_overcommit_ratio / 100; + allowed = vm_commit_limit(); /* * Reserve some 3% for root */ if (!cap_sys_admin) allowed -= sysctl_admin_reserve_kbytes >> (PAGE_SHIFT - 10); - allowed += total_swap_pages; /* * Don't let a single process grow so big a user can't recover diff --git a/mm/util.c b/mm/util.c index eaf63fc2c92..f7bc2096071 100644 --- a/mm/util.c +++ b/mm/util.c @@ -7,6 +7,9 @@ #include <linux/security.h> #include <linux/swap.h> #include <linux/swapops.h> +#include <linux/mman.h> +#include <linux/hugetlb.h> + #include <asm/uaccess.h> #include "internal.h" @@ -398,6 +401,16 @@ struct address_space *page_mapping(struct page *page) return mapping; } +/* + * Committed memory limit enforced when OVERCOMMIT_NEVER policy is used + */ +unsigned long vm_commit_limit(void) +{ + return ((totalram_pages - hugetlb_total_pages()) + * sysctl_overcommit_ratio / 100) + total_swap_pages; +} + + /* Tracepoints definitions. */ EXPORT_TRACEPOINT_SYMBOL(kmalloc); EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); |