From: "Paul E. McKenney" <paulmck@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
Dave Martin <Dave.Martin@arm.com>, Will Deacon <will@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
Marco Elver <elver@google.com>,
Mark Rutland <mark.rutland@arm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Jason Wang <jasowang@redhat.com>,
virtualization@lists.linux-foundation.org,
Alan Stern <stern@rowland.harvard.edu>,
Matt Turner <mattst88@gmail.com>,
kernel-team <kernel-team@android.com>,
Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Boqun Feng <boqun.feng@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Richard Henderson <rth@twiddle.net>,
LKML <linux-kernel@vger.kernel.org>,
linux-alpha@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y
Date: Wed, 8 Jul 2020 11:20:36 -0700 [thread overview]
Message-ID: <20200708182036.GR9247@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <20200708091620.GF597537@hirez.programming.kicks-ass.net>
On Wed, Jul 08, 2020 at 11:16:20AM +0200, Peter Zijlstra wrote:
> On Tue, Jul 07, 2020 at 04:01:28PM -0700, Nick Desaulniers wrote:
> > I'm trying to put together a Micro Conference for Linux Plumbers
> > conference focused on "make LLVM slightly less shitty." Do you all
> > plan on attending the conference? Would it be worthwhile to hold a
> > session focused on discussing this (LTO and memory models) be
> > worthwhile?
>
> I'd love to have a session about compilers and memory ordering with both
> GCC and CLANG in attendance.
>
> We need a solution for dependent-loads and control-dependencies for both
> toolchains.
What Peter said! ;-)
Thanx, Paul
WARNING: multiple messages have this Message-ID (diff)
From: "Paul E. McKenney" <paulmck@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
Dave Martin <Dave.Martin@arm.com>, Will Deacon <will@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
Marco Elver <elver@google.com>,
Mark Rutland <mark.rutland@arm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Jason Wang <jasowang@redhat.com>,
virtualization@lists.linux-foundation.org,
Alan Stern <stern@rowland.harvard.edu>,
Matt Turner <mattst88@gmail.com>,
kernel-team <kernel-team@android.com>,
Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Boqun Feng <boqun.feng@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Richard
Subject: Re: [PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y
Date: Wed, 8 Jul 2020 11:20:36 -0700 [thread overview]
Message-ID: <20200708182036.GR9247@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <20200708091620.GF597537@hirez.programming.kicks-ass.net>
On Wed, Jul 08, 2020 at 11:16:20AM +0200, Peter Zijlstra wrote:
> On Tue, Jul 07, 2020 at 04:01:28PM -0700, Nick Desaulniers wrote:
> > I'm trying to put together a Micro Conference for Linux Plumbers
> > conference focused on "make LLVM slightly less shitty." Do you all
> > plan on attending the conference? Would it be worthwhile to hold a
> > session focused on discussing this (LTO and memory models) be
> > worthwhile?
>
> I'd love to have a session about compilers and memory ordering with both
> GCC and CLANG in attendance.
>
> We need a solution for dependent-loads and control-dependencies for both
> toolchains.
What Peter said! ;-)
Thanx, Paul
WARNING: multiple messages have this Message-ID (diff)
From: "Paul E. McKenney" <paulmck@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Jason Wang <jasowang@redhat.com>,
virtualization@lists.linux-foundation.org,
Will Deacon <will@kernel.org>,
Alan Stern <stern@rowland.harvard.edu>,
Sami Tolvanen <samitolvanen@google.com>,
Matt Turner <mattst88@gmail.com>,
kernel-team <kernel-team@android.com>,
Dave Martin <Dave.Martin@arm.com>, Marco Elver <elver@google.com>,
Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Boqun Feng <boqun.feng@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Richard Henderson <rth@twiddle.net>,
Nick Desaulniers <ndesaulniers@google.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-alpha@vger.kernel.org
Subject: Re: [PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y
Date: Wed, 8 Jul 2020 11:20:36 -0700 [thread overview]
Message-ID: <20200708182036.GR9247@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <20200708091620.GF597537@hirez.programming.kicks-ass.net>
On Wed, Jul 08, 2020 at 11:16:20AM +0200, Peter Zijlstra wrote:
> On Tue, Jul 07, 2020 at 04:01:28PM -0700, Nick Desaulniers wrote:
> > I'm trying to put together a Micro Conference for Linux Plumbers
> > conference focused on "make LLVM slightly less shitty." Do you all
> > plan on attending the conference? Would it be worthwhile to hold a
> > session focused on discussing this (LTO and memory models) be
> > worthwhile?
>
> I'd love to have a session about compilers and memory ordering with both
> GCC and CLANG in attendance.
>
> We need a solution for dependent-loads and control-dependencies for both
> toolchains.
What Peter said! ;-)
Thanx, Paul
_______________________________________________
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linux-arm-kernel@lists.infradead.org
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next prev parent reply other threads:[~2020-07-08 18:20 UTC|newest]
Thread overview: 200+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-30 17:37 [PATCH 00/18] Allow architectures to override __READ_ONCE() Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 01/18] tools: bpf: Use local copy of headers including uapi/linux/filter.h Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-07-01 16:38 ` Alexei Starovoitov
2020-07-01 16:38 ` Alexei Starovoitov
2020-07-01 16:38 ` Alexei Starovoitov
2020-07-01 16:38 ` Alexei Starovoitov
2020-06-30 17:37 ` [PATCH 02/18] compiler.h: Split {READ,WRITE}_ONCE definitions out into rwonce.h Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 02/18] compiler.h: Split {READ, WRITE}_ONCE " Will Deacon
2020-06-30 17:37 ` [PATCH 02/18] compiler.h: Split {READ,WRITE}_ONCE " Will Deacon
2020-06-30 19:11 ` Arnd Bergmann
2020-06-30 19:11 ` [PATCH 02/18] compiler.h: Split {READ, WRITE}_ONCE " Arnd Bergmann
2020-06-30 19:11 ` [PATCH 02/18] compiler.h: Split {READ,WRITE}_ONCE " Arnd Bergmann
2020-07-01 10:16 ` Will Deacon
2020-07-01 10:16 ` Will Deacon
2020-07-01 10:16 ` Will Deacon
2020-07-01 11:33 ` Arnd Bergmann
2020-07-01 11:33 ` [PATCH 02/18] compiler.h: Split {READ, WRITE}_ONCE " Arnd Bergmann
2020-07-01 11:33 ` [PATCH 02/18] compiler.h: Split {READ,WRITE}_ONCE " Arnd Bergmann
2020-06-30 17:37 ` [PATCH 03/18] asm/rwonce: Allow __READ_ONCE to be overridden by the architecture Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 04/18] alpha: Override READ_ONCE() with barriered implementation Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-07-02 9:32 ` Mark Rutland
2020-07-02 9:32 ` Mark Rutland
2020-07-02 9:32 ` Mark Rutland
2020-07-02 9:32 ` Mark Rutland
2020-07-02 9:48 ` Will Deacon
2020-07-02 9:48 ` Will Deacon
2020-07-02 9:48 ` Will Deacon
2020-07-02 9:48 ` Will Deacon
2020-07-02 10:08 ` Arnd Bergmann
2020-07-02 10:08 ` Arnd Bergmann
2020-07-02 10:08 ` Arnd Bergmann
2020-07-02 11:18 ` Will Deacon
2020-07-02 11:18 ` Will Deacon
2020-07-02 11:18 ` Will Deacon
2020-07-02 11:39 ` Arnd Bergmann
2020-07-02 11:39 ` Arnd Bergmann
2020-07-02 11:39 ` Arnd Bergmann
2020-07-02 14:43 ` Joel Fernandes
2020-07-02 14:43 ` Joel Fernandes
2020-07-02 14:43 ` Joel Fernandes
2020-07-02 14:55 ` Will Deacon
2020-07-02 14:55 ` Will Deacon
2020-07-02 14:55 ` Will Deacon
2020-07-02 15:07 ` Joel Fernandes
2020-07-02 15:07 ` Joel Fernandes
2020-07-02 15:07 ` Joel Fernandes
2020-06-30 17:37 ` [PATCH 05/18] asm/rwonce: Remove smp_read_barrier_depends() invocation Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 06/18] vhost: Remove redundant use of read_barrier_depends() barrier Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 07/18] alpha: Replace smp_read_barrier_depends() usage with smp_[r]mb() Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 08/18] locking/barriers: Remove definitions for [smp_]read_barrier_depends() Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 09/18] Documentation/barriers: Remove references to [smp_]read_barrier_depends() Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 10/18] Documentation/barriers/kokr: " Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 11/18] tools/memory-model: Remove smp_read_barrier_depends() from informal doc Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 12/18] include/linux: Remove smp_read_barrier_depends() from comments Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 13/18] checkpatch: Remove checks relating to [smp_]read_barrier_depends() Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 14/18] arm64: Reduce the number of header files pulled into vmlinux.lds.S Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 15/18] arm64: alternatives: Split up alternative.h Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 16/18] arm64: cpufeatures: Add capability for LDAPR instruction Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 17/18] arm64: alternatives: Remove READ_ONCE() usage during patch operation Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` [PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 17:37 ` Will Deacon
2020-06-30 19:25 ` Arnd Bergmann
2020-06-30 19:25 ` Arnd Bergmann
2020-06-30 19:25 ` Arnd Bergmann
2020-07-01 10:19 ` Will Deacon
2020-07-01 10:19 ` Will Deacon
2020-07-01 10:19 ` Will Deacon
2020-07-01 10:59 ` Arnd Bergmann
2020-07-01 10:59 ` Arnd Bergmann
2020-07-01 10:59 ` Arnd Bergmann
2020-06-30 19:47 ` Marco Elver
2020-06-30 19:47 ` Marco Elver
2020-06-30 19:47 ` Marco Elver
2020-06-30 20:20 ` Peter Zijlstra
2020-06-30 20:20 ` Peter Zijlstra
2020-06-30 20:20 ` Peter Zijlstra
2020-06-30 22:57 ` Sami Tolvanen
2020-06-30 22:57 ` Sami Tolvanen
2020-06-30 22:57 ` Sami Tolvanen
2020-07-01 10:25 ` Will Deacon
2020-07-01 10:25 ` Will Deacon
2020-07-01 10:25 ` Will Deacon
2020-07-01 10:24 ` Will Deacon
2020-07-01 10:24 ` Will Deacon
2020-07-01 10:24 ` Will Deacon
2020-07-01 17:07 ` Dave P Martin
2020-07-01 17:07 ` Dave P Martin
2020-07-01 17:07 ` Dave P Martin
2020-07-02 7:23 ` Will Deacon
2020-07-02 7:23 ` Will Deacon
2020-07-02 7:23 ` Will Deacon
2020-07-06 16:00 ` Dave Martin
2020-07-06 16:00 ` Dave Martin
2020-07-06 16:00 ` Dave Martin
2020-07-06 16:34 ` Paul E. McKenney
2020-07-06 16:34 ` Paul E. McKenney
2020-07-06 16:34 ` Paul E. McKenney
2020-07-06 17:05 ` Dave Martin
2020-07-06 17:05 ` Dave Martin
2020-07-06 17:05 ` Dave Martin
2020-07-06 17:05 ` Dave Martin
2020-07-06 17:36 ` Paul E. McKenney
2020-07-06 17:36 ` Paul E. McKenney
2020-07-06 17:36 ` Paul E. McKenney
2020-07-06 17:36 ` Paul E. McKenney
2020-07-07 10:29 ` Dave Martin
2020-07-07 10:29 ` Dave Martin
2020-07-07 10:29 ` Dave Martin
2020-07-07 10:29 ` Dave Martin
2020-07-07 22:51 ` Paul E. McKenney
2020-07-07 22:51 ` Paul E. McKenney
2020-07-07 22:51 ` Paul E. McKenney
2020-07-07 22:51 ` Paul E. McKenney
2020-07-07 23:01 ` Nick Desaulniers
2020-07-07 23:01 ` Nick Desaulniers
2020-07-08 7:15 ` Marco Elver
2020-07-08 7:15 ` Marco Elver
2020-07-08 7:15 ` Marco Elver
2020-07-08 9:16 ` Peter Zijlstra
2020-07-08 9:16 ` Peter Zijlstra
2020-07-08 9:16 ` Peter Zijlstra
2020-07-08 18:20 ` Paul E. McKenney [this message]
2020-07-08 18:20 ` Paul E. McKenney
2020-07-08 18:20 ` Paul E. McKenney
2020-07-06 18:35 ` Will Deacon
2020-07-06 18:35 ` Will Deacon
2020-07-06 18:35 ` Will Deacon
2020-07-06 19:23 ` Marco Elver
2020-07-06 19:23 ` Marco Elver
2020-07-06 19:23 ` Marco Elver
2020-07-06 19:42 ` Paul E. McKenney
2020-07-06 19:42 ` Paul E. McKenney
2020-07-06 19:42 ` Paul E. McKenney
2020-07-06 19:42 ` Paul E. McKenney
2020-07-06 16:08 ` Dave Martin
2020-07-06 16:08 ` Dave Martin
2020-07-06 16:08 ` Dave Martin
2020-07-06 18:35 ` Will Deacon
2020-07-06 18:35 ` Will Deacon
2020-07-06 18:35 ` Will Deacon
2020-07-07 10:10 ` Dave Martin
2020-07-07 10:10 ` Dave Martin
2020-07-07 10:10 ` Dave Martin
2020-07-01 7:38 ` [PATCH 00/18] Allow architectures to override __READ_ONCE() Josh Triplett
2020-07-01 7:38 ` Josh Triplett
2020-07-01 7:38 ` Josh Triplett
2020-07-01 7:38 ` Josh Triplett
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