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| author | Omar Sandoval | 2018-10-27 00:10:55 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2018-10-27 01:38:15 +0200 |
| commit | aa8aa8a331d27fcef3e60dabb918eb8c5c9a2ad9 (patch) | |
| tree | 5f200509a0bcf548126fc9abe385637924555853 /mm/hugetlb.c | |
| parent | mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS (diff) | |
| download | kernel-qcow2-linux-aa8aa8a331d27fcef3e60dabb918eb8c5c9a2ad9.tar.gz kernel-qcow2-linux-aa8aa8a331d27fcef3e60dabb918eb8c5c9a2ad9.tar.xz kernel-qcow2-linux-aa8aa8a331d27fcef3e60dabb918eb8c5c9a2ad9.zip | |
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 <osandov@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Sterba <dsterba@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
0 files changed, 0 insertions, 0 deletions