Christoph, On Fri, 2 Aug 2019, Christoph Hellwig wrote: > did you look into killing bіt spinlocks as a public API instead? Last time I did, there was resistance :) But I'm happy to try again. > The main users seems to be buffer heads, which are so bloated that > an extra spinlock doesn't really matter anyway. > > The list_bl and rhashtable uses kinda make sense to be, but they are > pretty nicely abstracted away anyway. The remaining users look > pretty questionable to start with. What about the page lock? mm/slub.c: bit_spin_lock(PG_locked, &page->flags); Thanks, tglx
