Re: [RFC PATCH v4 00/25] RSEQ node id and virtual cpu id extensions

On Wed, Sep 21, 2022 at 03:54:18PM -0400, Mathieu Desnoyers wrote:

On 2022-09-21 15:24, Mathieu Desnoyers wrote:

quoted

Extend the rseq ABI to expose a NUMA node ID and a vm_vcpu_id field.

The NUMA node ID field allows implementing a faster getcpu(2) in libc.

The virtual cpu id allows ideal scaling (down or up) of user-space
per-cpu data structures. The virtual cpu ids allocated within a memory
space are tracked by the scheduler, which takes into account the number
of concurrently running threads, thus implicitly considering the number
of threads, the cpu affinity, the cpusets applying to those threads, and
the number of logical cores on the system.

This series is based on the v5.19 tag.

Hi Peter,

I'm having MTA issues at the moment. I will resend the series as soon as I
can get hold of my sysadmin.

It landed in my inbox and Lore seems to have received a copy too; as
per:

  https://lkml.kernel.org/r/14ba275f-8ddc-33fc-2669-1c336436f473@efficios.com

So I'm thinking you did manage to send out mail and all is well.

I'll try and have a look later today.