diff options
| author | Lukas Czerner <lczerner@redhat.com> | 2013-05-21 23:17:23 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-05-21 23:17:23 -0400 |
| commit | d47992f86b307985b3215bcf141d56d1849d71df (patch) | |
| tree | e1ae47bd19185371462c5a273c15276534447349 /fs/ceph | |
| parent | c7788792a5e7b0d5d7f96d0766b4cb6112d47d75 (diff) | |
mm: change invalidatepage prototype to accept length
Currently there is no way to truncate partial page where the end
truncate point is not at the end of the page. This is because it was not
needed and the functionality was enough for file system truncate
operation to work properly. However more file systems now support punch
hole feature and it can benefit from mm supporting truncating page just
up to the certain point.
Specifically, with this functionality truncate_inode_pages_range() can
be changed so it supports truncating partial page at the end of the
range (currently it will BUG_ON() if 'end' is not at the end of the
page).
This commit changes the invalidatepage() address space operation
prototype to accept range to be invalidated and update all the instances
for it.
We also change the block_invalidatepage() in the same way and actually
make a use of the new length argument implementing range invalidation.
Actual file system implementations will follow except the file systems
where the changes are really simple and should not change the behaviour
in any way .Implementation for truncate_page_range() which will be able
to accept page unaligned ranges will follow as well.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/addr.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 3e68ac10104..b1899400df1 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -143,7 +143,8 @@ static int ceph_set_page_dirty(struct page *page) * dirty page counters appropriately. Only called if there is private * data on the page. */ -static void ceph_invalidatepage(struct page *page, unsigned long offset) +static void ceph_invalidatepage(struct page *page, unsigned int offset, + unsigned int length) { struct inode *inode; struct ceph_inode_info *ci; @@ -168,7 +169,7 @@ static void ceph_invalidatepage(struct page *page, unsigned long offset) ci = ceph_inode(inode); if (offset == 0) { - dout("%p invalidatepage %p idx %lu full dirty page %lu\n", + dout("%p invalidatepage %p idx %lu full dirty page %u\n", inode, page, page->index, offset); ceph_put_wrbuffer_cap_refs(ci, 1, snapc); ceph_put_snap_context(snapc); |