From: "Paul E. McKenney" <paulmck@kernel.org>
To: Marco Elver <elver@google.com>
Cc: akiyks@gmail.com, stern@rowland.harvard.edu, glider@google.com,
parri.andrea@gmail.com, andreyknvl@google.com, luto@kernel.org,
ard.biesheuvel@linaro.org, arnd@arndb.de, boqun.feng@gmail.com,
bp@alien8.de, dja@axtens.net, dlustig@nvidia.com,
dave.hansen@linux.intel.com, dhowells@redhat.com,
dvyukov@google.com, hpa@zytor.com, mingo@redhat.com,
j.alglave@ucl.ac.uk, joel@joelfernandes.org, corbet@lwn.net,
jpoimboe@redhat.com, luc.maranget@inria.fr, mark.rutland@arm.com,
npiggin@gmail.com, peterz@infradead.org, tglx@linutronix.de,
will@kernel.org, edumazet@google.com, kasan-dev@googlegroups.com,
linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
linux-efi@vger.kernel.org, linux-kbuild@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Subject: Re: [PATCH v4 00/10] Add Kernel Concurrency Sanitizer (KCSAN)
Date: Thu, 14 Nov 2019 14:15:59 -0800 [thread overview]
Message-ID: <20191114221559.GS2865@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <20191114213303.GA237245@google.com>
On Thu, Nov 14, 2019 at 10:33:03PM +0100, Marco Elver wrote:
> On Thu, 14 Nov 2019, Paul E. McKenney wrote:
>
> > On Thu, Nov 14, 2019 at 07:02:53PM +0100, Marco Elver wrote:
> > > This is the patch-series for the Kernel Concurrency Sanitizer (KCSAN).
> > > KCSAN is a sampling watchpoint-based *data race detector*. More details
> > > are included in **Documentation/dev-tools/kcsan.rst**. This patch-series
> > > only enables KCSAN for x86, but we expect adding support for other
> > > architectures is relatively straightforward (we are aware of
> > > experimental ARM64 and POWER support).
> > >
> > > To gather early feedback, we announced KCSAN back in September, and have
> > > integrated the feedback where possible:
> > > http://lkml.kernel.org/r/CANpmjNPJ_bHjfLZCAPV23AXFfiPiyXXqqu72n6TgWzb2Gnu1eA@mail.gmail.com
> > >
> > > The current list of known upstream fixes for data races found by KCSAN
> > > can be found here:
> > > https://github.com/google/ktsan/wiki/KCSAN#upstream-fixes-of-data-races-found-by-kcsan
> > >
> > > We want to point out and acknowledge the work surrounding the LKMM,
> > > including several articles that motivate why data races are dangerous
> > > [1, 2], justifying a data race detector such as KCSAN.
> > >
> > > [1] https://lwn.net/Articles/793253/
> > > [2] https://lwn.net/Articles/799218/
> >
> > I queued this and ran a quick rcutorture on it, which completed
> > successfully with quite a few reports.
>
> Great. Many thanks for queuing this in -rcu. And regarding merge window
> you mentioned, we're fine with your assumption to targeting the next
> (v5.6) merge window.
>
> I've just had a look at linux-next to check what a future rebase
> requires:
>
> - There is a change in lib/Kconfig.debug and moving KCSAN to the
> "Generic Kernel Debugging Instruments" section seems appropriate.
> - bitops-instrumented.h was removed and split into 3 files, and needs
> re-inserting the instrumentation into the right places.
>
> Otherwise there are no issues. Let me know what you recommend.
Sounds good!
I will be rebasing onto v5.5-rc1 shortly after it comes out. My usual
approach is to fix any conflicts during that rebasing operation.
Does that make sense, or would you prefer to send me a rebased stack at
that point? Either way is fine for me.
Thanx, Paul
next prev parent reply other threads:[~2019-11-14 22:16 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-14 18:02 [PATCH v4 00/10] Add Kernel Concurrency Sanitizer (KCSAN) Marco Elver
2019-11-14 18:02 ` [PATCH v4 01/10] kcsan: Add Kernel Concurrency Sanitizer infrastructure Marco Elver
2019-11-19 19:27 ` Qian Cai
2019-11-19 19:54 ` Marco Elver
2019-11-19 21:42 ` Qian Cai
2019-11-19 21:53 ` Marco Elver
2020-01-03 5:13 ` Qian Cai
2020-01-06 12:46 ` Marco Elver
2020-01-14 11:08 ` Qian Cai
2020-01-14 12:51 ` Marco Elver
2020-01-14 19:22 ` Paul E. McKenney
2020-01-14 20:30 ` Qian Cai
2020-01-14 21:34 ` Paul E. McKenney
2020-01-14 21:48 ` Qian Cai
2020-01-14 22:09 ` Paul E. McKenney
2019-11-14 18:02 ` [PATCH v4 02/10] include/linux/compiler.h: Introduce data_race(expr) macro Marco Elver
2019-11-14 18:02 ` [PATCH v4 03/10] kcsan: Add Documentation entry in dev-tools Marco Elver
2019-11-14 18:02 ` [PATCH v4 04/10] objtool, kcsan: Add KCSAN runtime functions to whitelist Marco Elver
2019-11-14 18:02 ` [PATCH v4 05/10] build, kcsan: Add KCSAN build exceptions Marco Elver
2019-11-14 18:02 ` [PATCH v4 06/10] seqlock, kcsan: Add annotations for KCSAN Marco Elver
2019-11-14 18:03 ` [PATCH v4 07/10] seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier Marco Elver
2019-11-14 18:03 ` [PATCH v4 08/10] asm-generic, kcsan: Add KCSAN instrumentation for bitops Marco Elver
2019-11-15 11:55 ` Marco Elver
2019-11-14 18:03 ` [PATCH v4 09/10] locking/atomics, kcsan: Add KCSAN instrumentation Marco Elver
2019-11-14 18:03 ` [PATCH v4 10/10] x86, kcsan: Enable KCSAN for x86 Marco Elver
2019-11-14 19:50 ` [PATCH v4 00/10] Add Kernel Concurrency Sanitizer (KCSAN) Paul E. McKenney
2019-11-14 21:33 ` Marco Elver
2019-11-14 22:15 ` Paul E. McKenney [this message]
2019-11-15 12:02 ` Marco Elver
2019-11-15 16:41 ` Paul E. McKenney
2019-11-15 17:14 ` Marco Elver
2019-11-15 20:43 ` Paul E. McKenney
2019-11-16 8:20 ` Marco Elver
2019-11-16 15:34 ` Paul E. McKenney
2019-11-16 18:09 ` Marco Elver
2019-11-16 18:28 ` Paul E. McKenney
2019-11-19 19:50 ` Qian Cai
2019-11-19 20:12 ` Qian Cai
2019-11-19 21:50 ` Marco Elver
2019-11-20 15:54 ` Marco Elver
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