ramfs is the most simple fs from page cache point of view. Let's start transparent huge page cache enabling here. ramfs pages are not movable[1] and switching to transhuge pages doesn't affect that. We need to fix this eventually. [1] http://lkml.org/lkml/2013/4/2/720 Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> --- fs/ramfs/file-mmu.c | 2 +- fs/ramfs/inode.c | 6 +++++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c index 4884ac5ae9..ae787bf9ba 100644 --- a/fs/ramfs/file-mmu.c +++ b/fs/ramfs/file-mmu.c @@ -32,7 +32,7 @@ const struct address_space_operations ramfs_aops = { .readpage = simple_readpage, - .write_begin = simple_write_begin, + .write_begin = simple_thp_write_begin, .write_end = simple_write_end, .set_page_dirty = __set_page_dirty_no_writeback, }; diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index 39d14659a8..5dafdfcd86 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -61,7 +61,11 @@ struct inode *ramfs_get_inode(struct super_block *sb, inode_init_owner(inode, dir, mode); inode->i_mapping->a_ops = &ramfs_aops; inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info; - mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER); + /* + * TODO: make ramfs pages movable + */ + mapping_set_gfp_mask(inode->i_mapping, + GFP_TRANSHUGE & ~__GFP_MOVABLE); mapping_set_unevictable(inode->i_mapping); inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; switch (mode & S_IFMT) { -- 1.8.4.rc3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>