On Tue, Nov 07, 2023 at 07:33:50AM +1100, Dave Chinner wrote: > That's not good. Can you please determine if this is a zero-day bug > with the nrext64 feature? I think it was merged in 5.19, so if you > could try to reproduce it on a 5.18 and 5.19 kernels first, that > would be handy. > > Also, from your s390 kernel build, can you get the pahole output > for the struct xfs_dinode both for a good kernel and a bad kernel? Another interesting angle is that s390 is the only mainstream big endian platform left. It might be interesting to also try to reproduce this in a ppc64be or sparc64 system if someone has one or a VM).