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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/volumes.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/volumes.c')
-rw-r--r--fs/btrfs/volumes.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 27d5f37b845..3f4a5932eac 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -605,6 +605,9 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
device->in_fs_metadata = 0;
device->mode = flags;
+ if (!blk_queue_nonrot(bdev_get_queue(bdev)))
+ fs_devices->rotating = 1;
+
fs_devices->open_devices++;
if (device->writeable) {
fs_devices->rw_devices++;
@@ -1473,6 +1476,9 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
root->fs_info->fs_devices->rw_devices++;
root->fs_info->fs_devices->total_rw_bytes += device->total_bytes;
+ if (!blk_queue_nonrot(bdev_get_queue(bdev)))
+ root->fs_info->fs_devices->rotating = 1;
+
total_bytes = btrfs_super_total_bytes(&root->fs_info->super_copy);
btrfs_set_super_total_bytes(&root->fs_info->super_copy,
total_bytes + device->total_bytes);