On Mon, 7 Apr 2014 05:11:30 PM Trent W. Buck wrote:
Avi Miller <avi.miller@gmail.com> writes:
The rotational = 0 means it’s non-spinning, so that’s fine.
Does this change anything *other than* making -o ssd the default?
Doesn't appear to, no. 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); } That fs-devices->rotating variable is populated when initialising or opening a btrfs device by something like: · if (!blk_queue_nonrot(bdev_get_queue(bdev))) . · root->fs_info->fs_devices->rotating = 1; cheers, Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC