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authorChris Mason <chris.mason@oracle.com>2009-06-10 09:51:32 -0400
committerChris Mason <chris.mason@oracle.com>2009-06-10 11:29:52 -0400
commitc289811cc096c57ff35550ee8132793a4f9b5b59 (patch)
tree47599d47419911c8365e0350e286dece1d5e48dd /fs/btrfs/super.c
parent451d7585a8bb1b9bec0d676ce3dece1923164e55 (diff)
Btrfs: autodetect SSD devices
During mount, btrfs will check the queue nonrot flag for all the devices found in the FS. If they are all non-rotating, SSD mode is enabled by default. If the FS was mounted with -o nossd, the non-rotating flag is ignored. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 7f5b2889949..3427db28f6f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -184,6 +184,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
case Opt_nossd:
printk(KERN_INFO "btrfs: not using ssd allocation "
"scheme\n");
+ btrfs_set_opt(info->mount_opt, NOSSD);
btrfs_clear_opt(info->mount_opt, SSD);
btrfs_clear_opt(info->mount_opt, SSD_SPREAD);
break;
@@ -438,6 +439,8 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
seq_printf(seq, ",thread_pool=%d", info->thread_pool_size);
if (btrfs_test_opt(root, COMPRESS))
seq_puts(seq, ",compress");
+ if (btrfs_test_opt(root, NOSSD))
+ seq_puts(seq, ",nossd");
if (btrfs_test_opt(root, SSD_SPREAD))
seq_puts(seq, ",ssd_spread");
else if (btrfs_test_opt(root, SSD))