Btrfs: Add mount -o nossd
This allows you to turn off the ssd mode via remount.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index e9ef8c3..22855a1 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -66,8 +66,8 @@
enum {
Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,
Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,
- Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_notreelog,
- Opt_ratio, Opt_flushoncommit, Opt_err,
+ Opt_ssd, Opt_nossd, Opt_thread_pool, Opt_noacl, Opt_compress,
+ Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_err,
};
static match_table_t tokens = {
@@ -83,6 +83,7 @@
{Opt_thread_pool, "thread_pool=%d"},
{Opt_compress, "compress"},
{Opt_ssd, "ssd"},
+ {Opt_nossd, "nossd"},
{Opt_noacl, "noacl"},
{Opt_notreelog, "notreelog"},
{Opt_flushoncommit, "flushoncommit"},
@@ -173,6 +174,10 @@
printk(KERN_INFO "btrfs: use ssd allocation scheme\n");
btrfs_set_opt(info->mount_opt, SSD);
break;
+ case Opt_nossd:
+ printk(KERN_INFO "btrfs: not using ssd allocation scheme\n");
+ btrfs_clear_opt(info->mount_opt, SSD);
+ break;
case Opt_nobarrier:
printk(KERN_INFO "btrfs: turning off barriers\n");
btrfs_set_opt(info->mount_opt, NOBARRIER);