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: <c425bc04-2b01-4616-a244-01c896367f7a@suse.com>
Date: Tue, 13 Jan 2026 21:37:13 +0200
From: Nikolay Borisov <nik.borisov@...e.com>
To: Borislav Petkov <bp@...en8.de>
Cc: "Luck, Tony" <tony.luck@...el.com>, "Li, Rongqing"
 <lirongqing@...du.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 13.01.26 г. 21:33 ч., Borislav Petkov wrote:
> On Tue, Jan 13, 2026 at 09:25:19PM +0200, Nikolay Borisov wrote:
>> mce_need_notify even now works just in the early notifier because it's set
>> in mce_early_notifier() and subsequently reset in mce_notify_irq() which is
>> called immediately after the set.
> 
> You still need to call something in mce_timer_fn() to know whether to halve
> the interval or not.

Yes, and why is Li's approach not working, i.e if mc_poll_banks() 
returns a value signalling "i found an MCE" we halve, otherwise we 
double it?

> 
> I wonder if it would be better/cleaner if mce_early_notifier() halves the
> interval and mce_timer_fn() just reads only the current interval value...
> maybe that'll be less logic spread around...
> 

That's certainly doable, but why should the interval setting be coupled 
to the initial notifier and not to mc_poll_banks?