On 2018/8/21 下午10:35, David Howells wrote: > David Sterba <dsterba@xxxxxxx> wrote: > >> - nothing: auto-detect non-rotating devices, enable SSD mount option in turn > > And it's right that this should only turn on SSD if *all* the devices are > non-rotating? If I didn't miss anything again, yes. It's btrfs_open_one_device() who updates fs_devices->rotating, and any device with rotating disk will set it to 1. So it needs all device to to non-rotating to meet !fs_info->fs_devices->rotating. Thanks, Qu > > David >
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