linux-kernel - Re: [PATCH v2] x86: Remove compat vdso support

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Message-ID: <CA+55aFzPntnPHCbNa6PNdeKQmFBsF4JNu0BHix8LsP2ybYQ-Yg@mail.gmail.com>
Date:	Tue, 11 Mar 2014 02:36:31 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Stefani Seibold <stefani@...bold.net>,
	Andreas Brief <Andreas.Brief@...de-schwarz.com>,
	Martin Runge <Martin.Runge@...de-schwarz.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [PATCH v2] x86: Remove compat vdso support

On Mon, Mar 10, 2014 at 9:10 PM, Andy Lutomirski <luto@...capital.net> wrote:
>
> I suspect that a lot of 32-bit Linux users want syscall and/or
> sysenter, and Stefani certainly wants the fast timing that the vDSO
> can provide.  Also, presumably __kernel_sigreturn serves some purpose
> :)

Are we talking about the same thing at all?

We're talking about the *COMPAT* vdso, right?

The one you were just told Fedora had never _ever_ enabled? And you
are seriously arguing that "peformance" is relevant, while at the same
time trying to claim that the fact that it DOES NOT WORK on SuSE -
which *did* enable it - is not such a big deal, and that we should
ignore the "don't break user space" rule?

Seriously?

WTF?

                Linus
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