From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Lutomirski <luto@amacapital.net>
Subject: Re: [PATCH v4 2/5] x86/msr: Carry on after a non-"safe"
 MSR access fails without !panic_on_oops
Date: Mon, 14 Mar 2016 11:10:16 -0700
Message-ID: <CALCETrV16vh5U0TRzdroSTBR_QHDX1C78t0DDW9qtKjOmV+2sQ__37130.1609128297$1457979134$gmane$org@mail.gmail.com>
References: <cover.1457805972.git.luto@kernel.org>
 <a3b871a4eb533340d04255409dfecc94f88c647d.1457805972.git.luto@kernel.org>
 <20160314120202.GD15800@pd.tnic>
 <CALCETrW6E0Nz6gSmRKTvHbQDhnHVpuhzmgZB1nZ3m-DL-Bt=tQ@mail.gmail.com>
 <CA+55aFwhBA8yPhuP8FfHjgbfDj3dwEjR86kkTH3rymYZqikhjw@mail.gmail.com>
 <CALCETrXhXPj_b6rUMn=SR0QwE92rL=k5DCFraZwBj9FpUgadYw@mail.gmail.com>
 <CA+55aFwr80aZ3-1H4VPB5=jeU_Yt=hYFfFvZC5-cNXzgXxGf3A@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <CA+55aFwr80aZ3-1H4VPB5=jeU_Yt=hYFfFvZC5-cNXzgXxGf3A@mail.gmail.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: KVM list <kvm@vger.kernel.org>, Peter Zijlstra <peterz@infradead.org>, X86 ML <x86@kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, xen-devel <Xen-devel@lists.xen.org>, Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>, Paolo Bonzini <pbonzini@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Arjan van de Ven <arjan@linux.intel.com>
List-Id: xen-devel@lists.xenproject.org
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