linux-kernel - Re: [PATCH 2/2] x86/MCE: Add command line option to extend MCE Records pool

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Date: Tue, 13 Feb 2024 00:10:09 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: "Luck, Tony" <tony.luck@...el.com>,
	Yazen Ghannam <yazen.ghannam@....com>,
	"Naik, Avadhut" <avadnaik@....com>,
	"Mehta, Sohil" <sohil.mehta@...el.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Avadhut Naik <avadhut.naik@....com>
Subject: Re: [PATCH 2/2] x86/MCE: Add command line option to extend MCE
 Records pool

On Mon, Feb 12, 2024 at 02:46:57PM -0800, Paul E. McKenney wrote:
> The usual reason is to exclude other CPUs also doing list_add_rcu()
> on the same list. 

Doh, it even says so in the comment above list_add_rcu().

And the traversal which is happening in NMI-like context is fine.

So phew, I think we should be fine here. Thanks!

And as it turns out, we're not going to need any of that after all as
it looks like we can allocate the proper size from the very beginning...

Lovely.

-- 
Regards/Gruss,
    Boris.

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