linux-kernel - Re: [PATCH] HWPOISON: add a pr_err message when forcibly send a sigbus

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Message-ID: <ef106f59-f7d6-93bc-6872-d60ded127830@gmx.de>
Date:   Sat, 19 Aug 2023 13:49:53 +0200
From:   Helge Deller <deller@....de>
To:     Shuai Xue <xueshuai@...ux.alibaba.com>, catalin.marinas@....com,
        will@...nel.org, James.Bottomley@...senPartnership.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        hpa@...or.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-parisc@...r.kernel.org
Subject: Re: [PATCH] HWPOISON: add a pr_err message when forcibly send a
 sigbus

On 8/19/23 12:22, Shuai Xue wrote:
> When a process tries to access a page that is already offline, the
> kernel will send a sigbus signal with the BUS_MCEERR_AR code. This
> signal is typically handled by a registered sigbus handler in the
> process. However, if the process does not have a registered sigbus
> handler, it is important for end users to be informed about what
> happened.
>
> To address this, add an error message similar to those implemented on
> the x86, powerpc, and parisc platforms.
>
> Signed-off-by: Shuai Xue <xueshuai@...ux.alibaba.com>
> ---
>   arch/arm64/mm/fault.c  | 2 ++
>   arch/parisc/mm/fault.c | 5 ++---
>   arch/x86/mm/fault.c    | 3 +--
>   3 files changed, 5 insertions(+), 5 deletions(-)

Acked-by: Helge Deller <deller@....de> # parisc