Ubuntu
linux package

  1. Bug #1323165
  2. Comment #12

Comment 12 for bug 1323165

Revision history for this message
Philipp Kern (pkern) wrote :

The commit removing the BUG_ON landed upstream in 3.16 (linus/master).

commit 107437febd495a50e2cd09c81bbaa84d30e57b07
Author: Rik van Riel <email address hidden>
Date: Tue Apr 29 15:36:15 2014 -0400

    mm/numa: Remove BUG_ON() in __handle_mm_fault()

    Changing PTEs and PMDs to pte_numa & pmd_numa is done with the
    mmap_sem held for reading, which means a pmd can be instantiated
    and turned into a numa one while __handle_mm_fault() is examining
    the value of old_pmd.

    If that happens, __handle_mm_fault() should just return and let
    the page fault retry, instead of throwing an oops. This is
    handled by the test for pmd_trans_huge(*pmd) below.

    Signed-off-by: Rik van Riel <email address hidden>
    Reviewed-by: Naoya Horiguchi <email address hidden>
    Reported-by: Sunil Pandey <email address hidden>
    Signed-off-by: Peter Zijlstra <email address hidden>
    Cc: Andrew Morton <email address hidden>
    Cc: Johannes Weiner <email address hidden>
    Cc: Kirill A. Shutemov <email address hidden>
    Cc: Linus Torvalds <email address hidden>
    Cc: Mel Gorman <email address hidden>
    Cc: <email address hidden>
    Cc: <email address hidden>
    Cc: <email address hidden>
    Link: http://<email address hidden>
    Signed-off-by: Ingo Molnar <email address hidden>