linux-kernel - Re: [RFC v2] arm:extend the reserved mrmory for initrd to be page aligned

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Date:	Fri, 5 Dec 2014 18:59:32 +0000
From:	Peter Maydell <peter.maydell@...aro.org>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Peter Maydell <Peter.Maydell@....com>,
	"Wang, Yalin" <Yalin.Wang@...ymobile.com>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	Will Deacon <Will.Deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC v2] arm:extend the reserved mrmory for initrd to be page aligned

On 5 December 2014 at 18:44, Catalin Marinas <catalin.marinas@....com> wrote:
> On Fri, Dec 05, 2014 at 05:27:02PM +0000, Russell King - ARM Linux wrote:
>> which makes the summary line rather misleading, and I really don't think
>> we need to do this on ARM for the simple reason that we've been doing it
>> for soo long that it can't be an issue.
>
> I started this as a revert and then realised that it doesn't solve
> anything for arm32 without changing the poisoning.
>
> Anyway, if you are happy with how it is, I'll drop the arm32 part. As I
> said yesterday, the issue is worse for arm64 with 64K pages.

If you do want to retain the arm32 "mustn't be in the 4K page of
the initrd tail" behaviour then it would probably be a good idea
to document this in the Booting spec.

thanks
-- PMM
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