On Thu, Jun 06, 2024 at 03:57:25PM +0300, Ofir Gal wrote: > The slab pages aren't allocated by the md-bitmap, they are pages that > happens to be after the allocated pages. I'm applying a patch to the md > subsystem asap. Similar cases could happen by other means as well. E.g. if you write to the last blocks in an XFS allocation group while also writing something to superblock copy at the beginnig of the next one and the two writes get merged. Probably not easy to reproduce but entirely possible. Just as as lot of other scenarious could happen due to merges.