linux-kernel - Re: [PATCH v3 17/17] x86/mce: Restore poll settings after storm subsides

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250512074616.GSaCGnSJbBpToh2VM6@fat_crate.local>
Date: Mon, 12 May 2025 09:46:16 +0200
From: Borislav Petkov <bp@...en8.de>
To: Yazen Ghannam <yazen.ghannam@....com>
Cc: x86@...nel.org, Tony Luck <tony.luck@...el.com>,
	linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
	Smita.KoralahalliChannabasappa@....com,
	Qiuxu Zhuo <qiuxu.zhuo@...el.com>
Subject: Re: [PATCH v3 17/17] x86/mce: Restore poll settings after storm
 subsides

On Tue, Apr 15, 2025 at 02:55:12PM +0000, Yazen Ghannam wrote:
> Users can disable MCA polling by setting the "ignore_ce" parameter or by
> setting "check_interval=0". This tells the kernel to *not* start the MCE
> timer on a CPU.
> 
> During a CMCI storm, the MCE timer will be started with a fixed
> interval.

Why?

If a user doesn't want CEs, why are we even bothering with CMCI storms?

Might as well disable the storm handling code altogether...

-- 
Regards/Gruss,
    Boris.

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