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Date:   Fri, 23 Dec 2022 11:30:58 -0800
From:   "H. Peter Anvin" <hpa@zytor.com>
To:     Peter Zijlstra <peterz@infradead.org>
CC:     "Li, Xin3" <xin3.li@intel.com>,
        "andrew.cooper3@citrix.com" <andrew.cooper3@citrix.com>,
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        "Christopherson,, Sean" <seanjc@google.com>,
        "pbonzini@redhat.com" <pbonzini@redhat.com>,
        "Shankar, Ravi V" <ravi.v.shankar@intel.com>
Subject: Re: [RFC PATCH 22/32] x86/fred: FRED initialization code
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On December 22, 2022 5:09:28 AM PST, Peter Zijlstra <peterz@infradead=2Eorg=
> wrote:
>On Tue, Dec 20, 2022 at 09:44:33PM -0800, H=2E Peter Anvin wrote:
>
>> Right, this is one major reason for putting #DB/NMI in a separate stack=
 level=2E
>
>But with the IST they each have their own stack, with FRED they'll share
>this small stack=2E

So make the stack larger if you think we need it=2E You still end up using=
 less total stack space with FRED=2E