diff options
| -rw-r--r-- | mm/mmap.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 772140c53ab..eaec3df82a2 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -84,10 +84,14 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags) } EXPORT_SYMBOL(vm_get_page_prot); -int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */ -int sysctl_overcommit_ratio = 50; /* default is 50% */ +int sysctl_overcommit_memory __read_mostly = OVERCOMMIT_GUESS; /* heuristic overcommit */ +int sysctl_overcommit_ratio __read_mostly = 50; /* default is 50% */ int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT; -struct percpu_counter vm_committed_as; +/* + * Make sure vm_committed_as in one cacheline and not cacheline shared with + * other variables. It can be updated by several CPUs frequently. + */ +struct percpu_counter vm_committed_as ____cacheline_aligned_in_smp; /* * Check that a process has enough memory to allocate a new virtual |