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Message-ID: <20180516162454.GJ12198@hirez.programming.kicks-ass.net>
Date: Wed, 16 May 2018 18:24:54 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
Boqun Feng <boqun.feng@...il.com>,
Andy Lutomirski <luto@...capital.net>,
Dave Watson <davejwatson@...com>, linux-kernel@...r.kernel.org,
linux-api@...r.kernel.org, Paul Turner <pjt@...gle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Russell King <linux@....linux.org.uk>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H . Peter Anvin" <hpa@...or.com>, Andrew Hunter <ahh@...gle.com>,
Andi Kleen <andi@...stfloor.org>, Chris Lameter <cl@...ux.com>,
Ben Maurer <bmaurer@...com>,
Steven Rostedt <rostedt@...dmis.org>,
Josh Triplett <josh@...htriplett.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Michael Kerrisk <mtk.manpages@...il.com>,
Joel Fernandes <joelaf@...gle.com>,
Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 02/14] rseq: Introduce restartable sequences system call
(v13)
On Mon, Apr 30, 2018 at 06:44:21PM -0400, Mathieu Desnoyers wrote:
> Expose a new system call allowing each thread to register one userspace
> memory area to be used as an ABI between kernel and user-space for two
> purposes: user-space restartable sequences and quick access to read the
> current CPU number value from user-space.
> ---
> MAINTAINERS | 11 ++
> arch/Kconfig | 7 +
> fs/exec.c | 1 +
> include/linux/sched.h | 134 +++++++++++++++++
> include/linux/syscalls.h | 4 +-
> include/trace/events/rseq.h | 57 +++++++
> include/uapi/linux/rseq.h | 133 +++++++++++++++++
> init/Kconfig | 23 +++
> kernel/Makefile | 1 +
> kernel/fork.c | 2 +
> kernel/rseq.c | 357 ++++++++++++++++++++++++++++++++++++++++++++
> kernel/sched/core.c | 2 +
> kernel/sys_ni.c | 3 +
> 13 files changed, 734 insertions(+), 1 deletion(-)
> create mode 100644 include/trace/events/rseq.h
> create mode 100644 include/uapi/linux/rseq.h
> create mode 100644 kernel/rseq.c
>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
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