On Tue, Aug 20, 2019 at 01:06:25PM +0200, Vlastimil Babka wrote: > > The whole point of copy_page is to copy exactly one page and it makes > > sense to assume that is aligned. A sane memcpy would use the same > > underlying primitives as well after checking they fit. So I think the > > prime issue here is btrfs' use of copy_page instead of memcpy. The > > secondary issue is slub fucking up alignments for no good reason. We > > just got bitten by that crap again in XFS as well :( > > Meh, I should finally get back to https://lwn.net/Articles/787740/ right
Yes. For now Dave came up with an idea for a workaround that will be forward-compatible with that: https://www.spinics.net/lists/linux-xfs/msg30521.html
