diff options
| author | David Sterba <dsterba@suse.com> | 2022-07-26 20:54:10 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-12-05 18:00:41 +0100 |
| commit | 63a7cb13071842966c1ce931edacbc23573aada5 (patch) | |
| tree | f888ce16a46f6aad0414e3457b15f0bcf416e615 /fs/btrfs/super.c | |
| parent | 467761f90405004e58795116aa7d81f3d298dcfb (diff) | |
btrfs: auto enable discard=async when possible
There's a request to automatically enable async discard for capable
devices. We can do that, the async mode is designed to wait for larger
freed extents and is not intrusive, with limits to iops, kbps or latency.
The status and tunables will be exported in /sys/fs/btrfs/FSID/discard .
The automatic selection is done if there's at least one discard capable
device in the filesystem (not capable devices are skipped). Mounting
with any other discard option will honor that option, notably mounting
with nodiscard will keep it disabled.
Link: https://lore.kernel.org/linux-btrfs/CAEg-Je_b1YtdsCR0zS5XZ_SbvJgN70ezwvRwLiCZgDGLbeMB=w@mail.gmail.com/
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 3a33dd9847d9..42e0d2fcc407 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -918,12 +918,14 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, ret = -EINVAL; goto out; } + btrfs_clear_opt(info->mount_opt, NODISCARD); break; case Opt_nodiscard: btrfs_clear_and_info(info, DISCARD_SYNC, "turning off discard"); btrfs_clear_and_info(info, DISCARD_ASYNC, "turning off async discard"); + btrfs_set_opt(info->mount_opt, NODISCARD); break; case Opt_space_cache: case Opt_space_cache_version: |