linux-kernel - Re: 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: <20260206220350.GBaYZlRvmgESS6JgkR@fat_crate.local>
Date: Fri, 6 Feb 2026 23:03:50 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Li,Rongqing" <lirongqing@...du.com>
Cc: "Luck, Tony" <tony.luck@...el.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: [外部邮件] Re: [PATCH] x86/mce: Fix timer interval
 adjustment after logging a MCE event

On Mon, Feb 02, 2026 at 11:49:40PM +0000, Li,Rongqing wrote:
> Is it possible where CPU0 sets mce_need_notify, but CPU1 concurrently calls
> mce_notify_irq in mce_timer_fn, and then CPU1 sets its own timer to 1/2
> instead of CPU0's

I don't see why not.

But this is no different than what it was before AFAICT.

And if the timer expiry interval on the wrong CPU gets halved, then it'll see
faster that there's no error for it to log and it'll enlarge the interval
again.

So I don't see a problem with that particular scenario.

Or?

-- 
Regards/Gruss,
    Boris.

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