From: Breno Leitao <leitao@debian.org>
To: Kiryl Shutsemau <kirill@shutemov.name>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
James Morse <james.morse@arm.com>,
Usama Arif <usama.arif@linux.dev>, Marc Zyngier <maz@kernel.org>,
Doug Anderson <dianders@chromium.org>,
Jinjie Ruan <ruanjinjie@huawei.com>,
Ada Couprie Diaz <ada.coupriediaz@arm.com>,
Vladimir Murzin <vladimir.murzin@arm.com>,
Linus Walleij <linusw@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Huth <thuth@redhat.com>, Dawei Li <dawei.li@linux.dev>,
mrigendrachaubey <mrigendra.chaubey@gmail.com>,
kernel-team@meta.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v2 2/2] arm64: sdei: Preserve the interrupted context's exception registers
Date: Fri, 6 Nov 2026 03:53:04 -0800 [thread overview]
Message-ID: <au2_ZaHK0gpqPIFR@gmail.com> (raw)
In-Reply-To: <au27CSJbg2Wdqh42@thinkstation>
On Fri, Nov 06, 2026 at 11:34:19AM +0000, Kiryl Shutsemau wrote:
> On Thu, Nov 05, 2026 at 07:41:12AM -0800, Breno Leitao wrote:
> > On Thu, Nov 05, 2026 at 12:08:34PM +0000, Kiryl Shutsemau wrote:
> > Tested-by: Breno Leitao <leitao@debian.org>
> >
> > Tested on NVIDIA Grace (firmware SDEI) with next-20261104, KASAN + lockdep,
> > ARM_SDEI_NMI=y: sysrq-l under stress-ng, with a kprobe on show_regs() and
> > eprobes on irq_disable/irq_enable that fault on purpose.
> >
> > Without the series the box crashed (a task interrupted in el0t_64_sync
> > got the handler's BRK, then lockdep/KASAN fallout and a hard lockup)
> >
> > With it, KPTI off and kpti=1, ~4000 kprobe hits and ~5500 faults in
> > irqentry_nmi_enter()/exit() produced no warnings or stalls.
>
> Thanks for testing!
>
> Just to clarify, does your Tested-by apply for whole series, right?
Right. I was planning to do it in the cover letter, but, there was no
tags there (such as Signed-off-by:) so, I did it on the second one.
next prev parent reply other threads:[~2026-11-06 11:53 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-05 12:08 [PATCH v2 0/2] arm64: sdei: Handle exceptions taken inside the event handler Kiryl Shutsemau
2026-11-05 12:08 ` [PATCH v2 1/2] arm64: sdei: Run the event handler on the kernel vectors Kiryl Shutsemau
2026-11-05 18:37 ` Catalin Marinas
2026-11-06 11:48 ` Kiryl Shutsemau
2026-11-06 17:38 ` Catalin Marinas
2026-11-06 16:14 ` Ada Couprie Diaz
2026-11-06 18:35 ` Catalin Marinas
2026-11-05 12:08 ` [PATCH v2 2/2] arm64: sdei: Preserve the interrupted context's exception registers Kiryl Shutsemau
2026-11-05 15:41 ` Breno Leitao
2026-11-06 11:34 ` Kiryl Shutsemau
2026-11-06 11:53 ` Breno Leitao [this message]
2026-11-06 18:36 ` [PATCH v2 0/2] arm64: sdei: Handle exceptions taken inside the event handler Catalin Marinas
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