On 10/18/22 15:24, Kirill A. Shutemov wrote: > On Tue, Oct 18, 2022 at 02:02:43PM -0700, Dave Hansen wrote: >> On 10/18/22 04:33, Kirill A. Shutemov wrote: >>> Add a line in /proc/$PID/arch_status to report untag_mask. It can be >>> used to find out LAM status of the process from the outside. It is >>> useful for debuggers. >> Considering that address masking is not x86-specific, it seems like this >> needs a better home (another file in /proc). > In generic /proc/$PID/status? Seems like a sane place to me. > And I'm not sure if it is a good idea at this stage. Semantics around tags > is not settled across architectures: somewhere it is per-thread, somewhere > per-process, somewhere it is global. > > Maybe keep it arch-specific? Yeah, but all of those things could be served by a thread-specific ABI. The per-thread ABI won't enumerate the scope of the thing, of course. But, it _can_ precisely communicate what semantics the thread has.
