Message-ID: <4F4CA5C2.4050605@redhat.com>
Date: Tue, 28 Feb 2012 12:00:34 +0200
From: Avi Kivity <avi@redhat.com>
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To: Andy Lutomirski <luto@amacapital.net>
CC: "H. Peter Anvin" <hpa@zytor.com>, Amit Shah <amit.shah@redhat.com>,
        tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
        linux-kernel@vger.kernel.org, kvm list <kvm@vger.kernel.org>
Subject: Re: [KVM paravirt issue?] Re: vsyscall=emulate regression
References: <20120203082748.GB782@amit.redhat.com> <20120214122205.GA29418@amit.redhat.com> <CALCETrVCzErebXrVk8Bi+k1TjigD3XvJsmZFVZb=ksmSCOTVLg@mail.gmail.com> <20120215110122.GA3136@amit.redhat.com> <CALCETrUmk+kpG9qLqSfrMP8Go9affMJCgybHFoK7Z2wm7ABXpA@mail.gmail.com> <4F3D2C09.1020803@redhat.com> <CALCETrUhGY8C8JLz6DrbBxukV58K=2jrMSfDyAm=eF7OWbKx7g@mail.gmail.com> <4F3D395B.1000708@redhat.com> <CALCETrXjJtKLhe2rRkuy57Ai+5X2-+qh9eMbE5y-UhX=CPWftA@mail.gmail.com> <4F3D3F59.80807@redhat.com> <4F471344.1010002@zytor.com> <CALCETrVk=3D0q2FHLhfZGhv4apFsJ1jnZAUWgwjRoFxT7OqPgQ@mail.gmail.com>
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On 02/24/2012 08:58 PM, Andy Lutomirski wrote:
> On Thu, Feb 23, 2012 at 8:34 PM, H. Peter Anvin <hpa@zytor.com> wrote:
> > On 02/16/2012 09:39 AM, Avi Kivity wrote:
> >>>
> >>> Yes, this is on purpose
> >
> > Why?
>
> I think the "this" refers to the PF_INSTR fault when executing at
> 0xffffffffff600xxx.  That's definitely intentional -- it's how
> vsyscall emulation works.
>
> I think it's unintentional that some kvm versions apparently forget to
> set the PF_INSTR bit.
>

Correct.  Can you provide the version that failed, so we can fix it?

-- 
error compiling committee.c: too many arguments to function

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