On Thu, Aug 21, 2025 at 05:37:15PM +0800, Yu Kuai wrote: > Fix bio splitting by the crypto fallback code Yes. > > I'll take look at all the callers of bio_chain(), in theory, we'll have > different use cases like: > > 1) chain old -> new, or chain new -> old > 2) put old or new to current->bio_list, currently always in the tail, > we might want a new case to the head; > > Perhaps it'll make sense to add high level helpers to do the chain > and resubmit and convert all callers to use new helpers, want do you > think? I don't think chaining really is problem here, but more how bios are split when already in the block layer. It's been a bit of a source for problems, so I think we'll need to sort it out. Especially as the handling of splits for the same device vs devices below the current one seems a bit problematic in general.
