Re: [PATCH 01/10] fs: turn inode ctime fields into a single ktime_t

[Christoph Hellwig]

On Tue, Jul 02, 2024 at 08:21:42AM -0400, Jeff Layton wrote:
> Many of the existing callers of inode_ctime_to_ts are in void return
> functions. They're just copying data from an internal representation to
> struct inode and assume it always succeeds. For those we'll probably
> have to catch bad ctime values earlier.
> 
> So, I think I'll probably have to roll bespoke error handling in all of
> the relevant filesystems if we go this route. There are also
> differences between filesystems -- does it make sense to refuse to load
> an inode with a bogus ctime on NFS or AFS? Probably not.
> 
> Hell, it may be simpler to just ditch this patch and reimplement
> mgtimes using the nanosecond fields like the earlier versions did.

Thatdoes for sure sound simpler.  What is the big advantage of the
ktime_t?  Smaller size?