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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2012-09-26 12:54:52 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-09-26 12:54:52 -0400 |
| commit | 8c85447391735469f407add6fdb0630ce59d7f6d (patch) | |
| tree | 9c047814f2aaaf0a61a611605a88c3c9f9e3184b /Documentation/sh | |
| 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>
Diffstat (limited to 'Documentation/sh')
0 files changed, 0 insertions, 0 deletions