On 01/11/2018 00:57, Andy Lutomirski wrote:

quoted

On Oct 31, 2018, at 2:00 PM, Peter Zijlstra [off-list ref] wrote:

quoted

I _think_ the use-case for atomics is updating the reference counts of
objects that are in this write-rare domain. But I'm not entirely clear
on that myself either. I just really want to avoid duplicating that
stuff.

Sounds nuts. Doing a rare-write is many hundreds of cycles at best. Using that for a reference count sounds wacky.

Can we see a *real* use case before we over complicate the API?

Does patch #14 of this set not qualify? ima_htable.len ?

https://www.openwall.com/lists/kernel-hardening/2018/10/23/20

--
igor