From: Thomas Gleixner <tglx@linutronix.de>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Andy Lutomirski <luto@kernel.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>, Andrew Hunter <ahh@google.com>,
Maged Michael <maged.michael@gmail.com>,
Avi Kivity <avi@scylladb.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Dave Watson <davejwatson@fb.com>,
"H . Peter Anvin" <hpa@zytor.com>,
Andrea Parri <parri.andrea@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Greg Hackmann <ghackmann@google.com>,
Will Deacon <will.deacon@arm.com>,
David Sehr <sehr@google.com>Linus Torvalds <to>
Subject: Re: [PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3)
Date: Tue, 16 Jan 2018 19:29:33 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.20.1801161928110.2366@nanos> (raw)
In-Reply-To: <20180115191104.12437-9-mathieu.desnoyers@efficios.com>
On Mon, 15 Jan 2018, Mathieu Desnoyers wrote:
> There are two places where core serialization is needed by membarrier:
>
> 1) When returning from the membarrier IPI,
> 2) After scheduler updates curr to a thread with a different mm, before
> going back to user-space, since the curr->mm is used by membarrier to
> check whether it needs to send an IPI to that CPU.
This wants to be split into x86 and core changes. Ideally you make the core
changes before the previous patch and add the empty inline into
linux/processor.h....
Thanks,
tglx
next prev parent reply other threads:[~2018-01-16 18:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-15 19:10 [PATCH for 4.16 00/10] membarrier updates for 4.16 Mathieu Desnoyers
2018-01-15 19:10 ` [PATCH for 4.16 01/10] membarrier: selftest: Test private expedited cmd (v2) Mathieu Desnoyers
2018-01-15 19:10 ` [PATCH for 4.16 02/10] powerpc: membarrier: Skip memory barrier in switch_mm() (v7) Mathieu Desnoyers
2018-01-15 19:10 ` [PATCH for 4.16 03/10] membarrier: Document scheduler barrier requirements (v5) Mathieu Desnoyers
2018-01-15 19:10 ` [PATCH for 4.16 04/10] membarrier: provide SHARED_EXPEDITED command (v2) Mathieu Desnoyers
2018-01-16 18:20 ` Thomas Gleixner
2018-01-16 19:02 ` Mathieu Desnoyers
[not found] ` <1577189631.3966.1516129345161.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2018-01-16 19:04 ` Thomas Gleixner
2018-01-15 19:11 ` [PATCH for 4.16 06/10] membarrier: Provide core serializing command Mathieu Desnoyers
[not found] ` <20180115191104.12437-1-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2018-01-15 19:10 ` [PATCH for 4.16 05/10] membarrier: selftest: Test shared expedited cmd Mathieu Desnoyers
2018-01-15 19:11 ` [PATCH for 4.16 07/10] x86: Introduce sync_core_before_usermode (v2) Mathieu Desnoyers
2018-01-16 18:28 ` Thomas Gleixner
2018-01-15 19:11 ` [PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3) Mathieu Desnoyers
2018-01-16 18:29 ` Thomas Gleixner [this message]
2018-01-16 19:22 ` Mathieu Desnoyers
2018-01-16 20:41 ` Mathieu Desnoyers
2018-01-15 19:11 ` [PATCH for 4.16 09/10] membarrier: arm64: Provide core serializing command Mathieu Desnoyers
2018-01-15 19:11 ` [PATCH for 4.16 10/10] membarrier: selftest: Test private expedited sync core cmd Mathieu Desnoyers
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