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btrfs-progs: docs: also mention no compression for swapfile 

The fact that the +C attribute excludes compression is mentioned in
<https://btrfs.readthedocs.io/en/latest/ch-compression.html#compatibility>.

Also mention it at the swapfile for clarity.

Pull-request: #530
Author: Nikolaos Chatzikonstantinou <nchatz314@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolaos Chatzikonstantinou 2022-10-14 14:48:35 -04:00 committed by David Sterba
parent 69b0d7756d
commit 6f11a70215
1 changed files with 1 additions and 2 deletions
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Documentation/ch-swapfile.rst
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@ -7,8 +7,7 @@ swap subsystem:
* filesystem - must have only *single* data profile
* swapfile - the containing subvolume cannot be snapshotted
* swapfile - must be preallocated
* swapfile - must be nodatacow (ie. also nodatasum)
* swapfile - must not be compressed
* swapfile - must be nodatacow (ie. also nodatasum, no compression)
The limitations come namely from the COW-based design and mapping layer of
blocks that allows the advanced features like relocation and multi-device