From: Peter Zijlstra <peterz@infradead.org>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Sven Schnelle <svens@linux.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
the arch/x86 maintainers <x86@kernel.org>
Subject: Re: [GIT pull] locking/urgent for v5.10-rc6
Date: Tue, 1 Dec 2020 19:48:07 +0100 [thread overview]
Message-ID: <20201201184807.GN3092@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20201201181506.GM3092@hirez.programming.kicks-ass.net>
On Tue, Dec 01, 2020 at 07:15:06PM +0100, Peter Zijlstra wrote:
> On Tue, Dec 01, 2020 at 03:55:19PM +0100, Peter Zijlstra wrote:
> > On Tue, Dec 01, 2020 at 06:46:44AM -0800, Paul E. McKenney wrote:
> >
> > > > So after having talked to Sven a bit, the thing that is happening, is
> > > > that this is the one place where we take interrupts with RCU being
> > > > disabled. Normally RCU is watching and all is well, except during idle.
> > >
> > > Isn't interrupt entry supposed to invoke rcu_irq_enter() at some point?
> > > Or did this fall victim to recent optimizations?
> >
> > It does, but the problem is that s390 is still using
>
> I might've been too quick there, I can't actually seem to find where
> s390 does rcu_irq_enter()/exit().
Argh, do_IRQ is per arch.. and that does irq_enter() which then does the
deed (thanks Sven!).
next prev parent reply other threads:[~2020-12-01 18:48 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-29 13:37 [GIT pull] irq/urgent " Thomas Gleixner
2020-11-29 13:38 ` [GIT pull] locking/urgent " Thomas Gleixner
2020-11-29 19:31 ` Linus Torvalds
2020-11-30 0:29 ` Paul E. McKenney
2020-11-30 7:56 ` Peter Zijlstra
2020-11-30 8:23 ` Sven Schnelle
2020-11-30 12:31 ` Sven Schnelle
2020-11-30 12:52 ` Peter Zijlstra
2020-11-30 13:03 ` Peter Zijlstra
2020-11-30 18:04 ` Linus Torvalds
2020-11-30 19:31 ` Christian Borntraeger
2020-12-01 8:07 ` Peter Zijlstra
2020-12-01 11:07 ` Peter Zijlstra
2020-12-01 14:46 ` Paul E. McKenney
2020-12-01 14:55 ` Peter Zijlstra
2020-12-01 16:53 ` Paul E. McKenney
2020-12-01 18:15 ` Peter Zijlstra
2020-12-01 18:48 ` Peter Zijlstra [this message]
2020-12-01 18:57 ` Mark Rutland
2020-12-01 19:14 ` Peter Zijlstra
2020-12-01 19:18 ` Heiko Carstens
2020-12-02 9:21 ` Peter Zijlstra
2020-12-02 10:56 ` Heiko Carstens
2020-12-02 11:16 ` Mark Rutland
2020-12-02 13:46 ` Heiko Carstens
2020-12-02 12:27 ` Peter Zijlstra
2020-12-01 7:48 ` Sven Schnelle
2020-12-02 7:54 ` Heiko Carstens
2020-12-02 9:38 ` Peter Zijlstra
2020-12-02 10:52 ` Heiko Carstens
2020-11-30 8:36 ` Peter Zijlstra
2020-11-30 17:55 ` Linus Torvalds
2020-12-01 7:39 ` Peter Zijlstra
2020-12-01 7:56 ` Peter Zijlstra
2020-12-01 19:45 ` Linus Torvalds
2020-12-02 7:53 ` Peter Zijlstra
2020-11-29 20:06 ` pr-tracker-bot
2020-11-29 20:06 ` [GIT pull] irq/urgent " pr-tracker-bot
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