Re: [PATCH v2] loop: block changing lo_offset/lo_sizelimit on mounted device

[Theodore Tso]

On Tue, Mar 31, 2026 at 12:22:18AM -0700, Christoph Hellwig wrote:
> 
> And I would not be surprised if this breaks something in blktests or
> xfstests as they heavily rely on resizing block devices.  Did you
> do full runs of those?  Especially with xfs and btrfs for xfstests
> as they do a lot more loop based tests?

Do we expect people to seriously be running with
!CONFIG_BLK_DEV_WRITE_MOUNTED?  I view this as a syzkaller noise
suppression only.  As I mentioned earlier this option will very likely
break grub.

I do think that we need to have a way of disabling write access on a
per-super or per-file system type basis, eventually.  Perhaps we need
to get there sooner rather than later?  Would that make you happier?

					- Ted