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Subject: Re: [PATCH] x86/vdso: Emit a GNU hash
To: Andy Lutomirski <luto@amacapital.net>
References: <fd56cc057a2d62ab31c56a48d04fccb435b3fd4f.1438897382.git.luto@kernel.org>
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CC: Andy Lutomirski <luto@kernel.org>, Anton Blanchard <anton@samba.org>,
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From: Nathan Lynch <Nathan_Lynch@mentor.com>
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Date: Fri, 7 Aug 2015 11:10:34 -0500
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On 08/06/2015 05:52 PM, Andy Lutomirski wrote:
> [adding lots of cc's]
> 
> On Thu, Aug 6, 2015 at 2:45 PM, Andy Lutomirski <luto@kernel.org> wrote:
>> From: Andy Lutomirski <luto@amacapital.net>
>>
>> Some dynamic loaders may be slightly faster if a GNU hash is
>> available.  Strangely, this seems to have no effect at all on the
>> vdso size.

FWIW, I see arch/x86/entry/vdso/vdso64.so increase by 168 bytes here,
using GCC 4.9.2, Binutils 2.24 as packaged by Fedora 21.

I see a similar increase when I make the equivalent change for ARM.