linux-kernel - Re: How could we get rid of saved_max

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Date:	Mon, 10 Mar 2014 22:20:45 -0700
From:	Jon Mason <jdmason@...zu.us>
To:	Muli Ben-Yehuda <muli@...technion.ac.il>
Cc:	"H. Peter Anvin" <hpa@...or.com>, WANG Chao <chaowang@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vivek Goyal <vgoyal@...hat.com>,
	Yinghai Lu <yinghai@...nel.org>, Baoquan He <bhe@...hat.com>,
	kexec@...ts.infradead.org, discuss@...-64.org, x86@...nel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: How could we get rid of saved_max_pfn for calgary iommu?

On Sun, Mar 9, 2014 at 12:06 AM, Muli Ben-Yehuda <muli@...technion.ac.il> wrote:
> On Thu, Mar 06, 2014 at 07:46:44AM -0700, Jon Mason wrote:
>
>> > I don't know of anyone still using it, but it's not
>> > impossible. Calgary and CalIOC2 machines would now be ~5-8 years
>> > old.
>>
>> It is getting a bit crufty in arch/x86.  Would it be better to move
>> it to drivers/iommu?
>
> Not sure I see the potential benefit... I think for Calgary it's
> either leave it in arch/x86 or rip it out.

The intent is for it go where the other IOMMU drivers are, and gain
changes to the overall infrastructure as it evolves.  There has been a
decent amount of work going on in there  :)

Of course, someone would have to put the effort in and test it.

>
> Cheers,
> Muli
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