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
