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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-04-04 05:53:28 +0200 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-05-10 15:21:44 +0200 |
| commit | 1cb2d38cb3e59d58e8321a0592e84b5761afb063 (patch) | |
| tree | 151e7ffccd72f786a3da511b0f23906961835a22 /fs/nilfs2/segment.h | |
| parent | nilfs2: merge list_del()/list_add_tail() to list_move_tail() (diff) | |
| download | linux-1cb2d38cb3e59d58e8321a0592e84b5761afb063.tar.xz linux-1cb2d38cb3e59d58e8321a0592e84b5761afb063.zip | |
nilfs2: get rid of private page allocator
Previously, nilfs was cloning pages for mmapped region to freeze their
data and ensure consistency of checksum during writeback cycles. A
private page allocator was used for this page cloning. But, we no
longer need to do that since clear_page_dirty_for_io function sets up
pte so that vm_ops->page_mkwrite function is called right before the
mmapped pages are modified and nilfs_page_mkwrite function can safely
wait for the pages to be written back to disk.
So, this stops making a copy of mmapped pages during writeback, and
eliminates the private page allocation and deallocation functions from
nilfs.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/segment.h')
| -rw-r--r-- | fs/nilfs2/segment.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h index 6c02a86745fb..38a1d0013314 100644 --- a/fs/nilfs2/segment.h +++ b/fs/nilfs2/segment.h @@ -92,7 +92,6 @@ struct nilfs_segsum_pointer { * @sc_nblk_inc: Block count of current generation * @sc_dirty_files: List of files to be written * @sc_gc_inodes: List of GC inodes having blocks to be written - * @sc_copied_buffers: List of copied buffers (buffer heads) to freeze data * @sc_freesegs: array of segment numbers to be freed * @sc_nfreesegs: number of segments on @sc_freesegs * @sc_dsync_inode: inode whose data pages are written for a sync operation @@ -136,7 +135,6 @@ struct nilfs_sc_info { struct list_head sc_dirty_files; struct list_head sc_gc_inodes; - struct list_head sc_copied_buffers; __u64 *sc_freesegs; size_t sc_nfreesegs; |