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| author | Christoph Hellwig <hch@lst.de> | 2009-10-14 09:24:59 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-10-14 10:32:49 -0400 |
| commit | e244a0aeb6a599c19a7c802cda6e2d67c847b154 (patch) | |
| tree | 392d8d48c4e6676a552230135ad448d522007ece /fs/btrfs/ctree.h | |
| parent | 86df7eb921a009515285e7171363fa57dd2d7d31 (diff) | |
| download | op-kernel-dev-e244a0aeb6a599c19a7c802cda6e2d67c847b154.zip op-kernel-dev-e244a0aeb6a599c19a7c802cda6e2d67c847b154.tar.gz | |
Btrfs: add -o discard option
Enable discard by default is not a good idea given the the trim speed
of SSD prototypes we've seen, and the carecteristics for many high-end
arrays. Turn of discards by default and require the -o discard option
to enable them on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index dfd7e6f..e5dd628 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1153,6 +1153,7 @@ struct btrfs_root { #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) #define BTRFS_MOUNT_NOSSD (1 << 9) +#define BTRFS_MOUNT_DISCARD (1 << 10) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
