linux-api.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christopher Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
To: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Mathieu Desnoyers
	<mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>,
	"Paul E. McKenney"
	<paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
	Boqun Feng <boqun.feng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
	Dave Watson <davejwatson-b10kYP2dOMg@public.gmane.org>,
	linux-kernel
	<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	linux-api <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Paul Turner <pjt-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Andrew Morton
	<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
	Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
	Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
	Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
	Andrew Hunter <ahh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Andi Kleen <andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org>,
	Ben Maurer <bmaurer-b10kYP2dOMg@public.gmane.org>,
	rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
	Josh Triplett <josh-iaAMLnmF4UmaiuxdJuQwMA@public.gmane.org>,
	Linus Torvalds
	<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
	Catalin Marinas <catalin.marinas@arm.c>
Subject: Re: [RFC PATCH for 4.16 02/21] rseq: Introduce restartable sequences system call (v12)
Date: Fri, 15 Dec 2017 09:05:09 -0600 (CST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1712150903490.14235@nuc-kabylake> (raw)
In-Reply-To: <20171214212023.GJ3326@worktop>

On Thu, 14 Dec 2017, Peter Zijlstra wrote:

> > But my company has extensive user space code that maintains a lot of
> > counters and does other tricks to get full performance out of the
> > hardware. Such a mechanism would also be good from user space. Why keep
> > the good stuff only inside the kernel?
>
> Mathieu's proposal is for userspace, _only_ userspace.

But what we were talking about are instructions that work effectively in
kernel space whose efficiency restartable sequences could bring to user
space.

  reply	other threads:[~2017-12-15 15:05 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-14 16:13 [RFC PATCH for 4.16 00/21] Restartable sequences and CPU op vector Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 01/21] uapi headers: Provide types_32_64.h Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 02/21] rseq: Introduce restartable sequences system call (v12) Mathieu Desnoyers
2017-12-14 16:44   ` Christopher Lameter
2017-12-14 18:12     ` Mathieu Desnoyers
     [not found]       ` <12046460.34426.1513275177081.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-12-14 18:50         ` Christopher Lameter
2017-12-14 19:24           ` Mathieu Desnoyers
2017-12-14 21:14             ` Christopher Lameter
2017-12-14 21:20               ` Peter Zijlstra
2017-12-15 15:05                 ` Christopher Lameter [this message]
2017-12-15 16:52                   ` Mathieu Desnoyers
     [not found]                     ` <729438855.35910.1513356742518.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-12-15 17:13                       ` Christopher Lameter
2017-12-14 19:48           ` Peter Zijlstra
2017-12-14 19:57             ` Mathieu Desnoyers
     [not found]               ` <1772818221.34575.1513281428902.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-12-14 20:09                 ` Peter Zijlstra
2017-12-14 16:13 ` [RFC PATCH for 4.16 03/21] arm: Add restartable sequences support Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 04/21] arm: Wire up restartable sequences system call Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 05/21] x86: Add support for restartable sequences Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 06/21] x86: Wire up restartable sequence system call Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 08/21] powerpc: Wire up restartable sequences " Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 09/21] sched: Implement push_task_to_cpu Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 10/21] cpu_opv: Provide cpu_opv system call (v5) Mathieu Desnoyers
     [not found]   ` <20171214161403.30643-11-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2018-02-12 15:49     ` Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 11/21] x86: Wire up cpu_opv system call Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 12/21] powerpc: " Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 14/21] selftests: lib.mk: Introduce OVERRIDE_TARGETS Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 15/21] cpu_opv: selftests: Implement selftests (v6) Mathieu Desnoyers
2017-12-14 16:13 ` [RFC PATCH for 4.16 16/21] rseq: selftests: Provide rseq library (v5) Mathieu Desnoyers
     [not found] ` <20171214161403.30643-1-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-12-14 16:13   ` [RFC PATCH for 4.16 07/21] powerpc: Add support for restartable sequences Mathieu Desnoyers
2017-12-14 16:13   ` [RFC PATCH for 4.16 13/21] arm: Wire up cpu_opv system call Mathieu Desnoyers
2017-12-14 16:13   ` [RFC PATCH for 4.16 17/21] rseq: selftests: Provide percpu_op API Mathieu Desnoyers
2017-12-14 16:14 ` [RFC PATCH for 4.16 18/21] rseq: selftests: Provide basic test Mathieu Desnoyers
2017-12-14 16:14 ` [RFC PATCH for 4.16 19/21] rseq: selftests: Provide basic percpu ops test Mathieu Desnoyers
2017-12-14 16:14 ` [RFC PATCH for 4.16 20/21] rseq: selftests: Provide parametrized tests Mathieu Desnoyers
2017-12-14 16:14 ` [RFC PATCH for 4.16 21/21] rseq: selftests: Provide Makefile, scripts, gitignore Mathieu Desnoyers

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.20.1712150903490.14235@nuc-kabylake \
    --to=cl-vytec60ixjuavxtiumwx3w@public.gmane.org \
    --cc=ahh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org \
    --cc=akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
    --cc=andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org \
    --cc=bmaurer-b10kYP2dOMg@public.gmane.org \
    --cc=boqun.feng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
    --cc=catalin.marinas@arm.c \
    --cc=davejwatson-b10kYP2dOMg@public.gmane.org \
    --cc=hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org \
    --cc=josh-iaAMLnmF4UmaiuxdJuQwMA@public.gmane.org \
    --cc=linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org \
    --cc=luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org \
    --cc=mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org \
    --cc=mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
    --cc=paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org \
    --cc=peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org \
    --cc=pjt-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org \
    --cc=rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org \
    --cc=tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org \
    --cc=torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).