Re: [PATCH v2 1/3] fs: add infrastructure for multigrain inode i_m/ctime

[Matthew Wilcox]

On Tue, Apr 25, 2023 at 01:45:19PM -0400, Jeff Layton wrote:
> Erm...it may be an unpopular opinion, but I find that more confusing
> than just ensuring that the s_time_gran > 1. I keep wondering if we
> might want to carve out other low-order bits too for some later purpose,
> at which point trying to check this using flags wouldn't work right. I
> think I might just stick with what I have here, at least for now.

But what if I set s_time_gran to 3 or 5?  You'd really want a warning
about that.