lkml.org 
[lkml]   [2013]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 23/23] ramfs: enable transparent huge page cache
    Date
    From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>

    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@linux.intel.com>
    ---
    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


    \
     
     \ /
      Last update: 2013-08-04 04:41    [W:6.848 / U:0.036 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site