| commit | 8c85447391735469f407add6fdb0630ce59d7f6d | [log] [tgz] |
|---|---|---|
| author | Dmitry Monakhov <dmonakhov@openvz.org> | Wed Sep 26 12:54:52 2012 -0400 |
| committer | Theodore Ts'o <tytso@mit.edu> | Wed Sep 26 12:54:52 2012 -0400 |
| tree | 9c047814f2aaaf0a61a611605a88c3c9f9e3184b | |
| parent | bb5574880574fea38c674942cf0360253a2d60fe [diff] |
ext4: reimplement uninit extent optimization for move_extent_per_page() Uninitialized extent may became initialized(parallel writeback task) at any moment after we drop i_data_sem, so we have to recheck extent's state after we hold page's lock and i_data_sem. If we about to change page's mapping we must hold page's lock in order to serialize other users. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>