linux-kernel - Re: [RFC PATCH] x86: Do not panic if mce=2 is passed

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Date:   Mon, 31 Oct 2016 11:57:42 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Yinghai Lu <yinghai@...nel.org>
Cc:     Tony Luck <tony.luck@...el.com>,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-edac@...r.kernel.org, Yinghai Lu <yinghai.lu@...cle.com>
Subject: Re: [RFC PATCH] x86: Do not panic if mce=2 is passed

On Fri, Sep 16, 2016 at 01:23:25PM -0700, Yinghai Lu wrote:
> From: Yinghai Lu <yinghai.lu@...cle.com>
> 
> For UE recovery support, current we need mce=2 in command line
> and also disable panic_on_oops with sysctl.
> 
> but other user may still need to have panic_on_oops to 1 always.
> 
> We can remove checking of panic_on_oops for mce-severity path.
> 
> We should be ok as on default path when mce=2 is not passed, tolerant
> is 0, so they will still get MCE_PANIC_SEVERITY returned.
> 
> Signed-off-by: Yinghai Lu <yinghai.lu@...cle.com>
> 
> 
> ---
>  arch/x86/kernel/cpu/mcheck/mce-severity.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-2.6/arch/x86/kernel/cpu/mcheck/mce-severity.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/kernel/cpu/mcheck/mce-severity.c
> +++ linux-2.6/arch/x86/kernel/cpu/mcheck/mce-severity.c
> @@ -311,7 +311,7 @@ static int mce_severity_intel(struct mce
>  			*msg = s->msg;
>  		s->covered = 1;
>  		if (s->sev >= MCE_UC_SEVERITY && ctx == IN_KERNEL) {
> -			if (panic_on_oops || tolerant < 1)
> +			if (tolerant < 1)
>  				return MCE_PANIC_SEVERITY;
>  		}
>  		return s->sev;

Applied,
thanks.

-- 
Regards/Gruss,
    Boris.

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