Re: [PATCH] loop: reintroduce global lock for safe loop_validate_file() traversal

On 7/3/2021 10:42 PM, Tetsuo Handa wrote:

It is not clear why the size of old and new image files need to be the same.

filesystems have a heck of a time dealing with suddenly a smaller disk ;)

note that the commit in question predates the ability for filesystems to grow into larger spaces
or most of hotplug.

so it's quite possible that today we can allow switching to a larger file just fine