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author | Hugh Dickins <hughd@google.com> | 2016-05-19 17:12:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-19 19:12:14 -0700 |
commit | 1d069b7dd56728a0eb6acb138dce0d37600dee00 (patch) | |
tree | 29a891a8640bbf0356037d39a115e6ca7a995a75 /arch/arc | |
parent | bf8616d5fa179d6c755f06726567c6d63c6fbbc7 (diff) | |
download | op-kernel-dev-1d069b7dd56728a0eb6acb138dce0d37600dee00.zip op-kernel-dev-1d069b7dd56728a0eb6acb138dce0d37600dee00.tar.gz |
huge pagecache: extend mremap pmd rmap lockout to files
Whatever huge pagecache implementation we go with, file rmap locking
must be added to anon rmap locking, when mremap's move_page_tables()
finds a pmd_trans_huge pmd entry: a simple change, let's do it now.
Factor out take_rmap_locks() and drop_rmap_locks() to handle the locking
for make move_ptes() and move_page_tables(), and delete the
VM_BUG_ON_VMA which rejected vm_file and required anon_vma.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Yang Shi <yang.shi@linaro.org>
Cc: Ning Qu <quning@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arc')
0 files changed, 0 insertions, 0 deletions