From: Frederic Weisbecker <frederic@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>,
"Paul E. McKenney" <paulmck@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Linux 6.3-rc2
Date: Tue, 14 Mar 2023 00:25:33 +0100 [thread overview]
Message-ID: <ZA+w7d3RqGN/hAoM@localhost.localdomain> (raw)
In-Reply-To: <CAHk-=whwQxk12jfe28DV4-1-d9np1hKFtTy-ua=F4EcT8jcOOA@mail.gmail.com>
Le Mon, Mar 13, 2023 at 04:17:06PM -0700, Linus Torvalds a écrit :
> On Mon, Mar 13, 2023 at 4:11 PM Frederic Weisbecker <frederic@kernel.org> wrote:
> >
> > So the hardirq interrupted some code that has softirqs disabled (or
> > servicing) from the preempt mask POV but not from lockdep POV.
>
> .. but those are two different counters, so isn't that *always* racy?
> IOW, one counter being updated before the other...
>
> IOW, isn't this *why* that check isn't supposed to ever trigger at all
> from hard-irq context?
Right but these two values are always modified within the same IRQs
disabled section.
next prev parent reply other threads:[~2023-03-13 23:25 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-12 23:45 Linux 6.3-rc2 Linus Torvalds
2023-03-13 8:11 ` Build regressions/improvements in v6.3-rc2 Geert Uytterhoeven
2023-03-13 8:16 ` Geert Uytterhoeven
2023-03-13 9:08 ` HID: Stable backport request (all viable versions) Lee Jones
2023-03-13 10:51 ` Greg KH
2023-03-13 15:53 ` Linux 6.3-rc2 Guenter Roeck
2023-03-13 18:21 ` Linus Torvalds
2023-03-13 20:30 ` Guenter Roeck
2023-03-13 22:16 ` Linus Torvalds
2023-03-13 22:49 ` Guenter Roeck
2023-03-13 23:11 ` Frederic Weisbecker
2023-03-13 23:17 ` Linus Torvalds
2023-03-13 23:25 ` Frederic Weisbecker [this message]
2023-03-14 0:52 ` Guenter Roeck
2023-03-14 11:18 ` Frederic Weisbecker
2023-03-14 11:40 ` Peter Zijlstra
2023-03-14 12:01 ` Ard Biesheuvel
2023-03-14 12:27 ` Peter Zijlstra
2023-03-14 14:40 ` Guenter Roeck
2023-03-14 16:16 ` Guenter Roeck
2023-03-19 14:06 ` Linux regression tracking #adding (Thorsten Leemhuis)
2023-04-14 14:11 ` Linux regression tracking #update (Thorsten Leemhuis)
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