Btrfs: Add mount -o ssd, which includes optimizations for seek free storage
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index e506de3..b6982f0 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -64,7 +64,7 @@
enum {
Opt_subvol, Opt_nodatasum, Opt_nodatacow, Opt_max_extent,
- Opt_alloc_start, Opt_nobarrier, Opt_err,
+ Opt_alloc_start, Opt_nobarrier, Opt_ssd, Opt_err,
};
static match_table_t tokens = {
@@ -74,6 +74,7 @@
{Opt_nobarrier, "nobarrier"},
{Opt_max_extent, "max_extent=%s"},
{Opt_alloc_start, "alloc_start=%s"},
+ {Opt_ssd, "ssd"},
{Opt_err, NULL}
};
@@ -149,6 +150,12 @@
btrfs_set_opt(info->mount_opt, NODATASUM);
}
break;
+ case Opt_ssd:
+ if (info) {
+ printk("btrfs: use ssd allocation scheme\n");
+ btrfs_set_opt(info->mount_opt, SSD);
+ }
+ break;
case Opt_nobarrier:
if (info) {
printk("btrfs: turning off barriers\n");