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McKenney" , Boqun Feng , Andy Lutomirski , Dave Watson , linux-kernel , linux-api , Paul Turner , Andrew Morton , Russell King , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Andrew Hunter , Andi Kleen , Chris Lameter , Ben Maurer , rostedt , Josh Triplett , Linus Torvalds , Catalin Marinas , Will Deacon , Michael Kerrisk , Joel Fernandes , Alexander Viro Message-ID: <387129913.1919.1526501917147.JavaMail.zimbra@efficios.com> In-Reply-To: <20180516162454.GJ12198@hirez.programming.kicks-ass.net> References: <20180430224433.17407-1-mathieu.desnoyers@efficios.com> <20180430224433.17407-3-mathieu.desnoyers@efficios.com> <20180516162454.GJ12198@hirez.programming.kicks-ass.net> Subject: Re: [PATCH 02/14] rseq: Introduce restartable sequences system call (v13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [167.114.142.138] X-Mailer: Zimbra 8.8.8_GA_2026 (ZimbraWebClient - FF52 (Linux)/8.8.8_GA_2031) Thread-Topic: rseq: Introduce restartable sequences system call (v13) Thread-Index: AbSayWb6gH/6TCIUVZyQPLeP52FGeg== Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: ----- On May 16, 2018, at 12:24 PM, Peter Zijlstra peterz@infradead.org wrote: > 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) Thanks Peter ! Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com