Eric Lee / smarc-ti-linux-kernel

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Commit 1dd49bfa3465756b3ce72214b58a33e4afb67aa3

Authored by Mel Gorman
Committed by Ingo Molnar
1 parent 959f58544b
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

mm: numa: Do not account for a hinting fault if we raced 

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>

Showing 1 changed file with 4 additions and 1 deletions Side-by-side Diff

... ... @@ -1325,8 +1325,11 @@
1325 1325  
1326 1326 check_same:
1327 1327 spin_lock(&mm->page_table_lock);
1328   - if (unlikely(!pmd_same(pmd, *pmdp)))
  1328 + if (unlikely(!pmd_same(pmd, *pmdp))) {
  1329 + /* Someone else took our fault */
  1330 + current_nid = -1;
1329 1331 goto out_unlock;
  1332 + }
1330 1333 clear_pmdnuma:
1331 1334 pmd = pmd_mknonnuma(pmd);
1332 1335 set_pmd_at(mm, haddr, pmdp, pmd);