From: Boqun Feng <boqun.feng@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Lyude Paul <lyude@redhat.com>,
rust-for-linux@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
"open list:SCHEDULER" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v9 1/9] preempt: Introduce HARDIRQ_DISABLE_BITS
Date: Thu, 27 Feb 2025 17:33:10 -0800 [thread overview]
Message-ID: <Z8ESVjynMytXObEp@Mac.home> (raw)
In-Reply-To: <20250227180916.1ab6d957@gandalf.local.home>
On Thu, Feb 27, 2025 at 06:09:16PM -0500, Steven Rostedt wrote:
> On Thu, 27 Feb 2025 17:10:12 -0500
> Lyude Paul <lyude@redhat.com> wrote:
>
> > From: Boqun Feng <boqun.feng@gmail.com>
>
> -ENOCHANGLOG
>
Yeah, sorry, I forget to add them or ask Lyude to add when handing over
patches.
Lyude, could you add below in the future version?
In order to support preempt_disable()-like interrupt disabling, that is,
using part of preempt_count() to track interrupt disabling nested level,
change the preempt_count() layout to contain 8-bit HARDIRQ_DISABLE
count.
Note that HARDIRQ_BITS and NMI_BITS are reduced by 1 because of this,
and it changes the maximum of their (hardirq and nmi) nesting level.
(I will add patch #2's commit log shortly)
Regards,
Boqun
> Why is this patch needed?
>
> -- Steve
>
> >
> > Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
> > Signed-off-by: Lyude Paul <lyude@redhat.com>
next prev parent reply other threads:[~2025-02-28 1:33 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-27 22:10 [PATCH v9 0/9] Refcounted interrupts, SpinLockIrq for rust Lyude Paul
2025-02-27 22:10 ` [PATCH v9 1/9] preempt: Introduce HARDIRQ_DISABLE_BITS Lyude Paul
2025-02-27 23:09 ` Steven Rostedt
2025-02-28 1:33 ` Boqun Feng [this message]
2025-03-03 21:55 ` Lyude Paul
2025-02-28 7:57 ` Peter Zijlstra
2025-02-27 22:10 ` [PATCH v9 2/9] preempt: Introduce __preempt_count_{sub, add}_return() Lyude Paul
2025-02-28 1:49 ` Boqun Feng
2025-02-28 9:15 ` Heiko Carstens
2025-02-28 9:24 ` Peter Zijlstra
2025-04-30 21:38 ` Lyude Paul
2025-05-05 9:56 ` Heiko Carstens
2025-03-01 18:49 ` kernel test robot
2025-03-01 19:00 ` kernel test robot
2025-02-27 22:10 ` [PATCH v9 3/9] irq & spin_lock: Add counted interrupt disabling/enabling Lyude Paul
2025-03-01 20:19 ` kernel test robot
2025-02-27 22:10 ` [PATCH v9 4/9] rust: Introduce interrupt module Lyude Paul
2025-03-02 16:56 ` Dirk Behme
2025-02-27 22:10 ` [PATCH v9 5/9] rust: helper: Add spin_{un,}lock_irq_{enable,disable}() helpers Lyude Paul
2025-02-27 22:10 ` [PATCH v9 6/9] rust: sync: Add SpinLockIrq Lyude Paul
2025-03-02 11:51 ` Guangbo Cui
2025-03-03 22:15 ` Lyude Paul
2025-03-02 17:07 ` Dirk Behme
2025-04-04 21:56 ` Lyude Paul
2025-02-27 22:10 ` [PATCH v9 7/9] rust: sync: Introduce lock::Backend::Context Lyude Paul
2025-03-03 14:22 ` Dirk Behme
2025-02-27 22:10 ` [PATCH v9 8/9] rust: sync: lock: Add `Backend::BackendInContext` Lyude Paul
2025-03-03 14:23 ` Dirk Behme
2025-02-27 22:10 ` [PATCH v9 9/9] locking: Switch to _irq_{disable,enable}() variants in cleanup guards Lyude Paul
2025-04-05 8:25 ` Guangbo Cui
2025-04-05 8:55 ` Guangbo Cui
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