Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception

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Subject: Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Mon, 4 Apr 2016 18:00:42 +0200
Cc: Jan Kara <jack@xxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, xen-devel <Xen-devel@xxxxxxxxxxxxx>, Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, X86 ML <x86@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Petr Mladek <pmladek@xxxxxxx>, KVM list <kvm@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
In-reply-to: <CALCETrVriftUPNZ8pCQ1x9TWDHnRx8fWUvJgCQToPEOxqMLb3w@mail.gmail.com>
User-agent: Mutt/1.5.21 (2012-12-30)

On Mon, Apr 04, 2016 at 08:32:21AM -0700, Andy Lutomirski wrote:

> Adding locking would be easy enough, wouldn't it?

See patch in this thread..

> But do any platforms really boot a second CPU before switching to real
> printk? 

I _only_ use early_printk() as printk() is a quagmire of fail :-)
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Follow-Ups:
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Borislav Petkov

References:
- [PATCH v5 0/9] Improve non-"safe" MSR access failure handling
  - From: Andy Lutomirski
- [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Andy Lutomirski
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Borislav Petkov
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Andy Lutomirski
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Borislav Petkov
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Andy Lutomirski
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Jan Kara
- Re: [PATCH v5 3/9] x86/head: Move early exception panic code into early_fixup_exception
  - From: Andy Lutomirski

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