From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> 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 | 3 ++- fs/ramfs/inode.c | 6 +++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c index 4884ac5..3236e41 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, }; @@ -47,6 +47,7 @@ const struct file_operations ramfs_file_operations = { .splice_read = generic_file_splice_read, .splice_write = generic_file_splice_write, .llseek = generic_file_llseek, + .release = simple_thp_release, }; const struct inode_operations ramfs_file_inode_operations = { diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index 39d1465..5dafdfc 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) { -- 1.8.3.2 -- 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>