linux-kernel - Re: [PATCH] x86: Align jump targets to 1 byte boundaries

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Message-ID: <20150518064848.GB12869@gmail.com>
Date:	Mon, 18 May 2015 08:48:48 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: Align jump targets to 1 byte boundaries


* Josh Triplett <josh@...htriplett.org> wrote:

> > > Also, you've only applied these to 64-bit; could you please 
> > > apply them to both 32-bit and 64-bit, since many embedded 
> > > systems aiming for small code size use 32-bit?  (Unless 32-bit 
> > > already defaults to these.)
> > 
> > First things first - 64-bit is getting far more testing these days 
> > than 32-bit.
> 
> What testing do you want to see on these patches before applying 
> them to 32-bit as well?

Not much specific testing is needed I think, basically just
'no regressions for a few weeks'.

These alignment changes should be pretty safe, since -Os (via 
CONFIG_CC_OPTIMIZE_FOR_SIZE=y) already enabled these.

Thanks,

	Ingo
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