]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
mm: numa: Do not account for a hinting fault if we raced
authorMel Gorman <mgorman@suse.de>
Mon, 7 Oct 2013 10:28:42 +0000 (11:28 +0100)
committerIngo Molnar <mingo@kernel.org>
Tue, 29 Oct 2013 10:37:05 +0000 (11:37 +0100)
If another task handled a hinting fault in parallel then do not double
account for it.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-5-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
mm/huge_memory.c

index 610e3df2768a6a5b2ec1e293da4c96dafbbe2d30..33ee637648ba519cd408a77d7a70922a442247a9 100644 (file)
@@ -1325,8 +1325,11 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
 
 check_same:
        spin_lock(&mm->page_table_lock);
-       if (unlikely(!pmd_same(pmd, *pmdp)))
+       if (unlikely(!pmd_same(pmd, *pmdp))) {
+               /* Someone else took our fault */
+               current_nid = -1;
                goto out_unlock;
+       }
 clear_pmdnuma:
        pmd = pmd_mknonnuma(pmd);
        set_pmd_at(mm, haddr, pmdp, pmd);