From: Catalin Marinas <catalin.marinas@arm.com>
To: shechenglong <shechenglong@xfusion.com>
Cc: will@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, stone.xulei@xfusion.com,
chenjialong@xfusion.com, yuxiating@xfusion.com,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH] cpu: fix hard lockup triggered by printk calls within scheduling context
Date: Thu, 25 Sep 2025 14:48:34 +0100 [thread overview]
Message-ID: <aNVIMhQKlBp43iHs@arm.com> (raw)
In-Reply-To: <20250924123247.807-1-shechenglong@xfusion.com>
On Wed, Sep 24, 2025 at 08:32:47PM +0800, shechenglong wrote:
> relocate the printk() calls from spectre_v4_mitigations_off() and
> spectre_v2_mitigations_off() into setup_system_capabilities() function,
> preventing hard lockups that occur when printk() is invoked from scheduler context.
>
> Link: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20250918064907.1832-1-shechenglong@xfusion.com/
> Suggested-by: Mark Rutland <mark.rutland@arm.com>
> Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: shechenglong <shechenglong@xfusion.com>
It looks fine to me. Thanks.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Will, do you want to take this for 6.18? It might be worth a cc stable.
In general it's unlikely to happen unless you keep writing to
/sys/kernel/debug/clear_warn_once.
--
Catalin
next prev parent reply other threads:[~2025-09-25 13:48 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-18 6:49 [PATCH] cpu: fix hard lockup triggered during stress-ng stress testing shechenglong
2025-09-18 11:28 ` Catalin Marinas
2025-09-19 12:05 ` 答复: " shechenglong
2025-09-22 16:54 ` Catalin Marinas
2025-09-22 16:08 ` Mark Rutland
2025-09-24 12:32 ` [PATCH] cpu: fix hard lockup triggered by printk calls within scheduling context shechenglong
2025-09-25 13:48 ` Catalin Marinas [this message]
2025-10-03 14:23 ` Will Deacon
2025-10-20 14:51 ` [PATCH v2 0/2] arm64: spectre: Fix hard lockup and cleanup mitigation messages shechenglong
2025-10-20 14:51 ` [PATCH v2 1/2] cpu:Remove the print when the CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY Kconfig option is disabled shechenglong
2025-10-20 14:51 ` shechenglong
2025-10-20 14:51 ` [PATCH v2 2/2] cpu: fix hard lockup triggered by printk calls within scheduling context shechenglong
2025-10-20 14:51 ` shechenglong
2025-10-29 3:45 ` [RESEND v2 0/2] arm64: spectre: Fix hard lockup and cleanup mitigation messages shechenglong
2025-10-29 3:45 ` [PATCH v2 1/2] cpu:Remove the print when the CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY Kconfig option is disabled shechenglong
2025-10-29 3:45 ` shechenglong
2025-10-30 14:48 ` Will Deacon
2025-10-29 3:45 ` [PATCH v2 2/2] cpu: fix hard lockup triggered by printk calls within scheduling context shechenglong
2025-10-29 3:45 ` shechenglong
2025-10-30 14:50 ` Will Deacon
2025-10-31 9:15 ` [PATCH v3 0/2] arm64: spectre: Fix hard lockup and cleanup mitigation messages shechenglong
2025-10-31 9:15 ` [PATCH v3 1/2] cpu:Remove the print when the CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY Kconfig option is disabled shechenglong
2025-10-31 9:15 ` [PATCH v3 2/2] cpu: fix hard lockup triggered by printk calls within scheduling context shechenglong
2025-11-07 15:53 ` [PATCH v3 0/2] arm64: spectre: Fix hard lockup and cleanup mitigation messages Will Deacon
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