[PATCH] HZ: 300Hz support

[powerpc.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 156861f..a07120d 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1991,6 +1991,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
        delayacct_set_flag(DELAYACCT_PF_SWAPIN);
        page = lookup_swap_cache(entry);
        if (!page) {
+               grab_swap_token(); /* Contend for token _before_ read-in */
                swapin_readahead(entry, address, vma);
                page = read_swap_cache_async(entry, vma, address);
                if (!page) {
@@ -2008,7 +2009,6 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
                /* Had to read the page from swap area: Major fault */
                ret = VM_FAULT_MAJOR;
                count_vm_event(PGMAJFAULT);
-               grab_swap_token();
        }
 
        delayacct_clear_flag(DELAYACCT_PF_SWAPIN);