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

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Message-ID: <878ushgsfi.fsf@tassilo.jf.intel.com>
Date:	Mon, 10 Mar 2014 23:28:33 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>, 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>
Subject: Re: [PATCH] x86: Remove compat vdso support

Andy Lutomirski <luto@...capital.net> writes:

> The compat vDSO is a complicated hack that's needed to maintain
> compatibility with a small range of never-released glibc versions.
>
> This removes it and replaces it with a much simpler hack: a config
> option to disable the 32-bit vDSO by default.

Nack!

That breaks at least one SUSE version.

And I don't want to break performance completely there either.
int 0x80 is just too slow.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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