| From | Anthony Yznaga <> | Subject | [RFC v2 25/43] mm: shmem: prevent swapping of PKRAM-enabled tmpfs pages | Date | Tue, 30 Mar 2021 14:36:00 -0700 |
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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.yznaga@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
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