Apologize for taking a long time - this got swamped in a sea of other kernel bits. There doesn't seem to be much of a point now to switch to the XArray zero entry for what is currently DAX_ZERO_ENTRY. However, if you want to explore it further, a potential thought could be adapting the bits around the XArray 257 entry. There's a large swath of available bits that we could use between bit 3 and bit 9. If Matthew really wants to use the XA zero entry for it, perhaps we could shift the other DAX bits to those? Best regards, Amy Parker (she/her/hers)
