linux-kernel - Re: 答复: 答复: 答复: [外部邮件] Re: [PATCH] x86/mce: Fix timer interval adjustment after logging a MCE event

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Message-ID: <20260113191027.GPaWaYo1CY0aMccJCI@fat_crate.local>
Date: Tue, 13 Jan 2026 20:10:27 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: "Li, Rongqing" <lirongqing@...du.com>,
	Nikolay Borisov <nik.borisov@...e.com>,
	Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"H . Peter Anvin" <hpa@...or.com>,
	Yazen Ghannam <yazen.ghannam@....com>,
	"Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>,
	Avadhut Naik <avadhut.naik@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
Subject: Re: 答复: 答复: 答复: [外部邮件] Re: [PATCH] x86/mce: Fix timer interval adjustment after logging a MCE event

On Tue, Jan 13, 2026 at 06:53:13PM +0000, Luck, Tony wrote:
> Once upon a time the polling interval started out at 5 minutes, but the
> interval was halved each time an error was found (so interval went
> 150s, 75s, 37s, ... down to 1s). If no error was found, then the interval
> was doubled (going back up to 300s).
> 
> This is described in the comment:
> 
>         /*
>          * Alert userspace if needed. If we logged an MCE, reduce the polling
>          * interval, otherwise increase the polling interval.
>          */
> 
> It seems that the kernel isn't doing that today.

So the halving is not happening anymore because mce_notify_irq() is not
returning true.

I guess we botched that somewhere along the way...

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette