linux-kernel - Re: [PATCH v9 2/3] x86/mce: Add per-bank CMCI storm mitigation

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Date:   Mon, 27 Nov 2023 16:42:02 -0800
From:   Tony Luck <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Yazen Ghannam <yazen.ghannam@....com>,
        Smita.KoralahalliChannabasappa@....com,
        dave.hansen@...ux.intel.com, x86@...nel.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev
Subject: Re: [PATCH v9 2/3] x86/mce: Add per-bank CMCI storm mitigation

On Mon, Nov 27, 2023 at 12:14:28PM -0800, Tony Luck wrote:
> On Mon, Nov 27, 2023 at 11:50:26AM -0800, Tony Luck wrote:
> > On Tue, Nov 21, 2023 at 12:54:48PM +0100, Borislav Petkov wrote:
> > > On Tue, Nov 14, 2023 at 02:04:46PM -0800, Tony Luck wrote:
> > But it isn't doing the same thing.  The timer calls:
> > 
> > 	machine_check_poll(0, this_cpu_ptr(&mce_poll_banks));
> > 
> > and cmci_mc_poll_banks() calls:
> > 
> > 	machine_check_poll(0, this_cpu_ptr(&mce_poll_banks));

        machine_check_poll(0, this_cpu_ptr(&mce_banks_owned));

> 
> Bah ... I've cut & pasted the same thing ... but I think there
> are separate bit maps ... maybe I'm wrong. Will go back and
> look again.
> 
> -Tony