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authorIngo Molnar <mingo@elte.hu>2009-05-18 07:37:44 +0200
committerIngo Molnar <mingo@elte.hu>2009-05-18 07:37:49 +0200
commitdc3f81b129b5439ba7bac265bbc6a51a39275dae (patch)
tree216030731d911249496d2e97206cd61431e31c89 /mm/mmap.c
parentd2517a49d55536b38c7a87e5289550cfedaa4dcc (diff)
parent1406de8e11eb043681297adf86d6892ff8efc27a (diff)
downloadvexpress-lsk-dc3f81b129b5439ba7bac265bbc6a51a39275dae.tar.gz
Merge commit 'v2.6.30-rc6' into perfcounters/core
Merge reason: this branch was on an -rc4 base, merge it up to -rc6 to get the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/mmap.c')
-rw-r--r--mm/mmap.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 8a49df4c736..2c1c2cb0e2e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -86,7 +86,7 @@ EXPORT_SYMBOL(vm_get_page_prot);
int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */
int sysctl_overcommit_ratio = 50; /* default is 50% */
int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
-atomic_long_t vm_committed_space = ATOMIC_LONG_INIT(0);
+struct percpu_counter vm_committed_as;
/*
* Check that a process has enough memory to allocate a new virtual
@@ -180,11 +180,7 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
if (mm)
allowed -= mm->total_vm / 32;
- /*
- * cast `allowed' as a signed long because vm_committed_space
- * sometimes has a negative value
- */
- if (atomic_long_read(&vm_committed_space) < (long)allowed)
+ if (percpu_counter_read_positive(&vm_committed_as) < allowed)
return 0;
error:
vm_unacct_memory(pages);
@@ -2491,4 +2487,8 @@ void mm_drop_all_locks(struct mm_struct *mm)
*/
void __init mmap_init(void)
{
+ int ret;
+
+ ret = percpu_counter_init(&vm_committed_as, 0);
+ VM_BUG_ON(ret);
}