linux-kernel - Re: powerpc/vdso: Emit GNU & SysV hashes

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Message-Id: <20151002074710.5E434140B0E@ozlabs.org>
Date:	Fri,  2 Oct 2015 17:47:10 +1000 (AEST)
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Michael Ellerman <mpe@...erman.id.au>, <linuxppc-dev@...abs.org>
Cc:	linux-kernel@...r.kernel.org, luto@...nel.org,
	Anton Blanchard <anton@...ba.org>
Subject: Re: powerpc/vdso: Emit GNU & SysV hashes

On Fri, 2015-07-08 at 03:05:42 UTC, Michael Ellerman wrote:
> Andy Lutomirski says:
> 
>   Some dynamic loaders may be slightly faster if a GNU hash is
>   available.
> 
>   This is unlikely to have any measurable effect on the time it takes
>   to resolve vdso symbols (since there are so few of them).  In some
>   contexts, it can be a win for a different reason: if every DSO has a
>   GNU hash section, then libc can avoid calculating SysV hashes at
>   all. Both musl and glibc appear to have this optimization.
> 
> Signed-off-by: Michael Ellerman <mpe@...erman.id.au>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/787b393c9f6300c343600d39

cheers
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