From: Andrea Parri <andrea.parri@amarulasolutions.com>
To: Anatol Pomozov <anatol.pomozov@gmail.com>
Cc: fw@strlen.de, Dmitry Vyukov <dvyukov@google.com>,
Paul McKenney <paulmck@linux.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrey Konovalov <andreyknvl@google.com>
Subject: Re: seqcount usage in xt_replace_table()
Date: Wed, 9 Jan 2019 12:24:32 +0100 [thread overview]
Message-ID: <20190109112432.GA6351@andrea> (raw)
In-Reply-To: <CAOMFOmUSttpLyeiRLjxw4rSN0tOiAq1jbwK=kRdCkuOKPOC3Rg@mail.gmail.com>
On Tue, Jan 08, 2019 at 04:36:46PM -0800, Anatol Pomozov wrote:
> Hello
>
> On Tue, Jan 8, 2019 at 4:02 PM Andrea Parri
> <andrea.parri@amarulasolutions.com> wrote:
> >
> > Hi Anatol,
> >
> > On Tue, Jan 08, 2019 at 11:33:39AM -0800, Anatol Pomozov wrote:
> > > Hello folks,
> > >
> > > A bit of context what I am doing. I am trying to port KTSAN (Kernel
> > > Thread Sanitizer) tool to v4.20. That tool tracks shared data usage
> > > and makes sure it is accessed in a thread-safe manner.
> >
> > Interesting! FYI, some LKMM's maintainers (Paul included) had and
> > continued to have some "fun" discussing topics related to "thread-
> > safe memory accesses": I'm sure that they'll be very interested in
> > such work of yours and eager to discuss your results.
>
> Thread Sanitizer is a great tool to find thread-safety issues with
> user-space code. The tool been developed by a team of smart people
> from Google [1].
>
> KTSAN is an attempt to bring the same ideas to Linux kernel [2]. A
> bunch of work been done there but the project is still at
> proof-of-concept point.
Yes, I have been aware of these tools since at least ;-)
https://groups.google.com/forum/#!msg/ktsan/bVZ1c6H2NE0/Dxrw55bfBAAJ
>
> I am not a part of Google's dynamic tools team. But I've decided to
> pick something to do during the New Year holidays so started porting
> KTSAN from v4.2 to v4.20. The work is "almost completed" but I need to
> fix a few crashes [3].
I guess my first reaction would remain
"it's kind of hard (to use an euphemism) to review 7,582 additions
or so for a data race detector without a clear/an accepted (by the
community) notion of data race..."
Andrea
>
> [1] https://github.com/google/sanitizers
> [2] https://github.com/google/ktsan/wiki
> [3] https://github.com/anatol/linux/tree/ktsan_4.20
next prev parent reply other threads:[~2019-01-09 11:24 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 19:33 seqcount usage in xt_replace_table() Anatol Pomozov
2019-01-08 22:37 ` Florian Westphal
2019-01-10 12:41 ` Peter Zijlstra
2019-01-10 12:53 ` Dmitry Vyukov
2019-01-10 20:18 ` Peter Zijlstra
2019-01-10 14:48 ` Florian Westphal
2019-01-10 20:20 ` Peter Zijlstra
2019-01-10 20:25 ` Peter Zijlstra
2019-01-10 22:29 ` Florian Westphal
2019-01-11 8:34 ` Peter Zijlstra
2019-01-11 14:08 ` Paul E. McKenney
2019-01-10 14:52 ` Paul E. McKenney
2019-01-09 0:02 ` Andrea Parri
2019-01-09 0:36 ` Anatol Pomozov
2019-01-09 5:35 ` Dmitry Vyukov
2019-01-09 11:24 ` Andrea Parri [this message]
2019-01-09 11:55 ` Dmitry Vyukov
2019-01-09 12:11 ` Andrea Parri
2019-01-09 12:29 ` Dmitry Vyukov
2019-01-09 17:10 ` Paul E. McKenney
2019-01-10 8:49 ` Dmitry Vyukov
2019-01-10 12:30 ` Andrea Parri
2019-01-10 12:38 ` Dmitry Vyukov
2019-01-10 12:46 ` Andrea Parri
2019-01-10 13:25 ` Dmitry Vyukov
2019-01-10 14:50 ` Paul E. McKenney
2019-01-10 12:44 ` Peter Zijlstra
2019-01-10 12:54 ` Dmitry Vyukov
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