linux-kernel - Re: [PATCH] crash: Default to CRASH_DUMP=n when support for it is unlikely

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Message-ID: <ZtE5Z/gDR1WixG9S@MiWiFi-R3L-srv>
Date: Fri, 30 Aug 2024 11:15:51 +0800
From: Baoquan He <bhe@...hat.com>
To: Dave Vasilevsky <dave@...ilevsky.ca>
Cc: glaubitz@...sik.fu-berlin.de, linuxppc-dev@...ts.ozlabs.org,
	linux-sh@...r.kernel.org, mpe@...erman.id.au,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Reimar Döffinger <Reimar.Doeffinger@....de>
Subject: Re: [PATCH] crash: Default to CRASH_DUMP=n when support for it is
 unlikely

Hi Dave,

On 08/23/24 at 08:51am, Dave Vasilevsky wrote:
......snip..
> diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
> index 1aa3c4a0c5b2..b04cfa23378c 100644
> --- a/arch/sh/Kconfig
> +++ b/arch/sh/Kconfig
> @@ -549,6 +549,9 @@ config ARCH_SUPPORTS_KEXEC
>  config ARCH_SUPPORTS_CRASH_DUMP
>  	def_bool BROKEN_ON_SMP
>  
> +config ARCH_DEFAULT_CRASH_DUMP
> +	def_bool n

If we don't add ARCH_DEFAULT_CRASH_DUMP at all in sh arch, the
CRASH_DUMP will be off by default according to the below new definition
of CRASH_DUMP?

Thanks
Baoquan

> +
>  config ARCH_SUPPORTS_KEXEC_JUMP
>  	def_bool y
>  
......  
> diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
> index 6c34e63c88ff..4d111f871951 100644
> --- a/kernel/Kconfig.kexec
> +++ b/kernel/Kconfig.kexec
> @@ -97,7 +97,7 @@ config KEXEC_JUMP
>  
>  config CRASH_DUMP
>  	bool "kernel crash dumps"
> -	default y
> +	default ARCH_DEFAULT_CRASH_DUMP
>  	depends on ARCH_SUPPORTS_CRASH_DUMP
>  	depends on KEXEC_CORE
>  	select VMCORE_INFO
> -- 
> 2.34.1
>