On Tue, Apr 20, 2021 at 10:05:29AM -0700, Darrick J. Wong wrote: > Hmm... so the behavior change here is that 32-bit kernels will start > logging 16-byte xfs_extent structures (like 64-bit kernels)? Yes. > I see that > xfs_extent_32 was added for 2.6.18; won't this break recovery on > everything from before that? Where everything is a 32-bit kernel that doesn't align properly, yes. > Granted, 2.6.17 came out 15 years ago and the last 2.6.16 LTS kernel was > released in 2008 so maybe we don't care, but this would seem to be a > breaking change, right? This seems like a reasonable change for all V5 > filesystems (since that format emerged well after 2.6.18), but not so > good for V4. Err, why?
