Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[mv-sheeva.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0e81eb5f0aea6f90fbc3be5fdbc712aca8086e35..da53a252b259f0f36f553e9646187db18d49d76a 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -612,8 +612,10 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem,
        /* pagein of a big page is an event. So, ignore page size */
        if (nr_pages > 0)
                __this_cpu_inc(mem->stat->count[MEM_CGROUP_STAT_PGPGIN_COUNT]);
-       else
+       else {
                __this_cpu_inc(mem->stat->count[MEM_CGROUP_STAT_PGPGOUT_COUNT]);
+               nr_pages = -nr_pages; /* for event */
+       }
 
        __this_cpu_add(mem->stat->count[MEM_CGROUP_EVENTS], nr_pages);
 
@@ -2351,13 +2353,19 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
                                gfp_t gfp_mask, enum charge_type ctype)
 {
        struct mem_cgroup *mem = NULL;
+       int page_size = PAGE_SIZE;
        struct page_cgroup *pc;
+       bool oom = true;
        int ret;
-       int page_size = PAGE_SIZE;
 
        if (PageTransHuge(page)) {
                page_size <<= compound_order(page);
                VM_BUG_ON(!PageTransHuge(page));
+               /*
+                * Never OOM-kill a process for a huge page.  The
+                * fault handler will fall back to regular pages.
+                */
+               oom = false;
        }
 
        pc = lookup_page_cgroup(page);
@@ -2366,7 +2374,7 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
                return 0;
        prefetchw(pc);
 
-       ret = __mem_cgroup_try_charge(mm, gfp_mask, &mem, true, page_size);
+       ret = __mem_cgroup_try_charge(mm, gfp_mask, &mem, oom, page_size);
        if (ret || !mem)
                return ret;