diff options
| author | Dominique Martinet <dominique.martinet@cea.fr> | 2014-01-10 13:44:09 +0100 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2014-01-10 09:20:51 -0600 |
| commit | fb89b45cdfdc8bdab93986f1bc1474e313295c31 (patch) | |
| tree | c19ec0f84315c6dc77ca2447f58e2508b76ce88a /fs/9p/vfs_addr.c | |
| parent | f94741fd2832e7abc30fbf6dc13ed627c1fcc01a (diff) | |
9P: introduction of a new cache=mmap model.
- Add cache=mmap option
- Make mmap read-write while keeping it as synchronous as possible
- Build writeback fid on mmap creation if it is writable
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_addr.c')
| -rw-r--r-- | fs/9p/vfs_addr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 9ff073f4090a..c71e88602ff4 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -202,6 +202,8 @@ static int v9fs_vfs_writepage(struct page *page, struct writeback_control *wbc) { int retval; + p9_debug(P9_DEBUG_VFS, "page %p\n", page); + retval = v9fs_vfs_writepage_locked(page); if (retval < 0) { if (retval == -EAGAIN) { @@ -282,6 +284,9 @@ static int v9fs_write_begin(struct file *filp, struct address_space *mapping, pgoff_t index = pos >> PAGE_CACHE_SHIFT; struct inode *inode = mapping->host; + + p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping); + v9inode = V9FS_I(inode); start: page = grab_cache_page_write_begin(mapping, index, flags); @@ -312,6 +317,8 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, loff_t last_pos = pos + copied; struct inode *inode = page->mapping->host; + p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping); + if (unlikely(copied < len)) { /* * zero out the rest of the area |