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| author | Chris Mason | 2009-06-10 15:51:32 +0200 |
|---|---|---|
| committer | Chris Mason | 2009-06-10 17:29:52 +0200 |
| commit | c289811cc096c57ff35550ee8132793a4f9b5b59 (patch) | |
| tree | 47599d47419911c8365e0350e286dece1d5e48dd /fs/btrfs/disk-io.c | |
| parent | Btrfs: add mount -o ssd_spread to spread allocations out (diff) | |
| download | kernel-qcow2-linux-c289811cc096c57ff35550ee8132793a4f9b5b59.tar.gz kernel-qcow2-linux-c289811cc096c57ff35550ee8132793a4f9b5b59.tar.xz kernel-qcow2-linux-c289811cc096c57ff35550ee8132793a4f9b5b59.zip | |
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/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index e572cf478a5d..f4dfbb7ab496 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1850,6 +1850,14 @@ struct btrfs_root *open_ctree(struct super_block *sb, if (IS_ERR(fs_info->transaction_kthread)) goto fail_cleaner; + if (!btrfs_test_opt(tree_root, SSD) && + !btrfs_test_opt(tree_root, NOSSD) && + !fs_info->fs_devices->rotating) { + printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " + "mode\n"); + btrfs_set_opt(fs_info->mount_opt, SSD); + } + if (btrfs_super_log_root(disk_super) != 0) { u64 bytenr = btrfs_super_log_root(disk_super); @@ -1893,6 +1901,7 @@ struct btrfs_root *open_ctree(struct super_block *sb, fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); if (!fs_info->fs_root) goto fail_trans_kthread; + return tree_root; fail_trans_kthread: |