mm, shmem: fix handling /sys/kernel/mm/transparent_hugepage/shmem_enabled
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Fri, 25 Aug 2017 22:55:33 +0000 (15:55 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 25 Aug 2017 23:12:46 +0000 (16:12 -0700)
commit435c0b87d661da83771c30ed775f7c37eed193fb
treefa01aec77d23c086e9f23650f12bc16ce94d5ff9
parent556b969a1cfe2686aae149137fa1dfcac0eefe54
mm, shmem: fix handling /sys/kernel/mm/transparent_hugepage/shmem_enabled

/sys/kernel/mm/transparent_hugepage/shmem_enabled controls if we want
to allocate huge pages when allocate pages for private in-kernel shmem
mount.

Unfortunately, as Dan noticed, I've screwed it up and the only way to
make kernel allocate huge page for the mount is to use "force" there.
All other values will be effectively ignored.

Link: http://lkml.kernel.org/r/20170822144254.66431-1-kirill.shutemov@linux.intel.com
Fixes: 5a6e75f8110c ("shmem: prepare huge= mount option and sysfs knob")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org> [4.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/shmem.c