From: Peter Zijlstra <peterz@infradead.org>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Marco Elver <elver@google.com>, Qian Cai <cai@lca.pw>,
Will Deacon <will@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
kasan-dev <kasan-dev@googlegroups.com>
Subject: Re: [PATCH] locking/osq_lock: fix a data race in osq_wait_next
Date: Wed, 29 Jan 2020 19:49:35 +0100 [thread overview]
Message-ID: <20200129184935.GU14879@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200129002253.GT2935@paulmck-ThinkPad-P72>
On Tue, Jan 28, 2020 at 04:22:53PM -0800, Paul E. McKenney wrote:
> On Tue, Jan 28, 2020 at 05:56:55PM +0100, Peter Zijlstra wrote:
> > On Tue, Jan 28, 2020 at 12:46:26PM +0100, Marco Elver wrote:
> >
> > > > Marco, any thought on improving KCSAN for this to reduce the false
> > > > positives?
> > >
> > > Define 'false positive'.
> >
> > I'll use it where the code as written is correct while the tool
> > complains about it.
>
> I could be wrong, but I would guess that Marco is looking for something
> a little less subjective and a little more specific. ;-)
How is that either? If any valid translation by a compile results in
correct functionality, yet the tool complains, then surely we can speak
of a objective fact.
next prev parent reply other threads:[~2020-01-29 18:49 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 16:38 [PATCH] locking/osq_lock: fix a data race in osq_wait_next Qian Cai
2020-01-22 16:59 ` Will Deacon
2020-01-22 17:08 ` Qian Cai
2020-01-22 22:38 ` Marco Elver
2020-01-22 23:54 ` Qian Cai
2020-01-23 9:39 ` Peter Zijlstra
2020-01-28 3:11 ` Qian Cai
2020-01-28 11:46 ` Marco Elver
2020-01-28 12:53 ` Qian Cai
2020-01-28 16:52 ` Peter Zijlstra
2020-01-28 16:56 ` Peter Zijlstra
2020-01-29 0:22 ` Paul E. McKenney
2020-01-29 15:29 ` Marco Elver
2020-01-29 18:40 ` Peter Zijlstra
2020-01-30 13:39 ` Marco Elver
2020-01-30 13:48 ` Peter Zijlstra
2020-01-31 3:32 ` Qian Cai
2020-01-29 18:49 ` Peter Zijlstra [this message]
2020-01-29 19:26 ` Paul E. McKenney
2020-01-23 9:36 ` Peter Zijlstra
2020-01-28 3:12 ` Qian Cai
2020-01-28 8:18 ` Marco Elver
2020-01-28 10:10 ` Qian Cai
2020-01-28 10:29 ` Marco Elver
2020-01-22 17:09 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200129184935.GU14879@hirez.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=cai@lca.pw \
--cc=elver@google.com \
--cc=kasan-dev@googlegroups.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=paulmck@kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.