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| author | David Sterba <dsterba@suse.com> | 2017-09-15 18:36:57 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-11-01 22:45:29 +0300 |
| commit | f51d2b59120ff364a5e612a594ed358767e1cd09 (patch) | |
| tree | 349ed68bde053fc040138f4255aca2dab83b0bba /fs/btrfs/inode.c | |
| parent | d4417e22551377c6e589c15ff2b931610e5230bc (diff) | |
| download | linux-f51d2b59120ff364a5e612a594ed358767e1cd09.tar.xz | |
btrfs: allow to set compression level for zlib
Preliminary support for setting compression level for zlib, the
following works:
$ mount -o compess=zlib # default
$ mount -o compess=zlib0 # same
$ mount -o compess=zlib9 # level 9, slower sync, less data
$ mount -o compess=zlib1 # level 1, faster sync, more data
$ mount -o remount,compress=zlib3 # level set by remount
The compress-force works the same as compress'. The level is visible in
the same format in /proc/mounts. Level set via file property does not
work yet.
Required patch: "btrfs: prepare for extensions in compression options"
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index f2787cab6f3b..3f1b53f85735 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -539,7 +539,10 @@ again: */ extent_range_clear_dirty_for_io(inode, start, end); redirty = 1; - ret = btrfs_compress_pages(compress_type, + + /* Compression level is applied here and only here */ + ret = btrfs_compress_pages( + compress_type | (fs_info->compress_level << 4), inode->i_mapping, start, pages, &nr_pages, |