Work around the limitation that shmem pages must be in memory in order
to be preserved by preventing them from being swapped out in the first
place. Do this by marking shmem pages associated with a PKRAM node
as unevictable.
Signed-off-by: Anthony Yznaga <anthony.yzn...@oracle.com>
---
mm/shmem.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/shmem.c b/mm/shmem.c
index c1c5760465f2..8dfe80aeee97 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2400,6 +2400,8 @@ static struct inode *shmem_get_inode(struct super_block
*sb, const struct inode
INIT_LIST_HEAD(&info->swaplist);
simple_xattrs_init(&info->xattrs);
cache_no_acl(inode);
+ if (sbinfo->pkram)
+ mapping_set_unevictable(inode->i_mapping);
switch (mode & S_IFMT) {
default:
--
1.8.3.1
