| commit | aa8aa8a331d27fcef3e60dabb918eb8c5c9a2ad9 | [log] [tgz] |
|---|---|---|
| author | Omar Sandoval <[email protected]> | Fri Oct 26 15:10:55 2018 -0700 |
| committer | Linus Torvalds <[email protected]> | Fri Oct 26 16:38:15 2018 -0700 |
| tree | 5f200509a0bcf548126fc9abe385637924555853 | |
| parent | bc4ae27d817a4e92071ef67cb6368120cfabe7ec [diff] |
mm: export add_swap_extent()
Btrfs currently does not support swap files because swap's use of bmap
does not work with copy-on-write and multiple devices. See 35054394c4b3
("Btrfs: stop providing a bmap operation to avoid swapfile corruptions").
However, the swap code has a mechanism for the filesystem to manually add
swap extents using add_swap_extent() from the ->swap_activate() aop.
iomap has done this since 67482129cdab ("iomap: add a swapfile activation
function"). Btrfs will do the same in a later patch, so export
add_swap_extent().
Link: http://lkml.kernel.org/r/bb1208575e02829aae51b538709476964f97b1ea.1536704650.git.osandov@fb.com
Signed-off-by: Omar Sandoval <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: David Sterba <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Nikolay Borisov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>