On Tue, Oct 02, 2018 at 07:38:08PM -0400, Theodore Ts'o wrote: > The code EXT4_IOC_SWAP_BOOT ioctl hasn't been updated in a while, and > it's a bit broken with respect to more modern ext4 kernels, especially > metadata checksums. Do you have any reports of anyone but sysbot actually using it? Maybe it is a better idea to drop it unless it also gets coverage in xfstests?