linux-kernel - Re: [PATCH 3/3] x86, vdso32: handle 32 bit vDSO larger one page

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Message-ID: <20140313211016.GC3793@tassilo.jf.intel.com>
Date:	Thu, 13 Mar 2014 14:10:16 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	Andy Lutomirski <luto@...capital.net>,
	Ingo Molnar <mingo@...hat.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Stefani Seibold <stefani@...bold.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andreas Brief <Andreas.Brief@...de-schwarz.com>,
	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Martin Runge <Martin.Runge@...de-schwarz.com>,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH 3/3] x86, vdso32: handle 32 bit vDSO larger one page

On Thu, Mar 13, 2014 at 02:04:56PM -0700, H. Peter Anvin wrote:
> On 03/13/2014 02:00 PM, Andi Kleen wrote:
> > 
> > At some point the majority of my nfsroot test image were OpenSUSE 9.
> > It was the last opensuse system that booted fast without udev or initrd :-)
> > 
> > I have mostly retired them by now, but still occasional usage.
> > 
> > So that why i would prefer to not cripple it.
> > 
> 
> It is already crippled in the sense that you can't boot without
> CONFIG_COMPAT_VDSO... so in that sense nothing has really changed.

And?  I always set that option of course.

Doesn't cripple it in any way.

Forcing it to int 0x80 does however.

-Andi
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