mm-swap-add-a-adaptive-full-cluster-cache-reclaim-fix

mm-swap-add-a-adaptive-full-cluster-cache-reclaim-fix

fix discard of full cluster

Link: https://lkml.kernel.org/r/CAMgjq7CWwK75_2Zi5P40K08pk9iqOcuWKL6khu=x4Yg_nXaQag@mail.gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Reported-by: David Hildenbrand <david@redhat.com>
Closes: https://lkml.kernel.org/r/3c79021a-e9a0-4669-a4e7-7060edf12d58@redhat.com
Cc: Barry Song <21cnbao@gmail.com>
Cc: Chris Li <chrisl@kernel.org>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>