linux-kernel - Re: [PATCH V2 0/5] Huge pages for short descriptors on ARM

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Message-ID: <20140424104624.GD19564@arm.com>
Date:	Thu, 24 Apr 2014 11:46:24 +0100
From:	Will Deacon <will.deacon@....com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Steve Capper <steve.capper@...aro.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"robherring2@...il.com" <robherring2@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"gerald.schaefer@...ibm.com" <gerald.schaefer@...ibm.com>
Subject: Re: [PATCH V2 0/5] Huge pages for short descriptors on ARM

On Thu, Apr 24, 2014 at 11:42:32AM +0100, Russell King - ARM Linux wrote:
> On Thu, Apr 24, 2014 at 11:36:39AM +0100, Will Deacon wrote:
> > I guess I'm after some commitment that this is (a) useful to somebody and
> > (b) going to be tested regularly, otherwise it will go the way of things
> > like big-endian, where we end up carrying around code which is broken more
> > often than not (although big-endian is more self-contained).
> 
> It may be something worth considering adding to my nightly builder/boot
> testing, but I suspect that's impractical as it probably requires a BE
> userspace, which would then mean that the platform can't boot LE.
> 
> I suspect that we will just have to rely on BE users staying around and
> reporting problems when they occur.

Indeed. Marc and I have BE guests running under kvmtool on an LE host, so
that's what I've been using (then a BE busybox can sit in the host
filesystem and be passed via something like 9pfs).

Will
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