linux-kernel - RE: [PATCH v3 2/2] mm: Introduce kernelcore=mirror option

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Message-ID: <E86EADE93E2D054CBCD4E708C38D364A5429B2DE@G01JPEXMBYT01>
Date:	Thu, 17 Dec 2015 01:38:55 +0000
From:	"Izumi, Taku" <izumi.taku@...fujitsu.com>
To:	Xishi Qiu <qiuxishi@...wei.com>
CC:	"Luck, Tony" <tony.luck@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"Kamezawa, Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>,
	"mel@....ul.ie" <mel@....ul.ie>,
	"Hansen, Dave" <dave.hansen@...el.com>,
	"matt@...eblueprint.co.uk" <matt@...eblueprint.co.uk>
Subject: RE: [PATCH v3 2/2] mm: Introduce kernelcore=mirror option

Dear Xishi,

 Sorry for late.

> -----Original Message-----
> From: Xishi Qiu [mailto:qiuxishi@...wei.com]
> Sent: Friday, December 11, 2015 6:44 PM
> To: Izumi, Taku/泉 拓
> Cc: Luck, Tony; linux-kernel@...r.kernel.org; linux-mm@...ck.org; akpm@...ux-foundation.org; Kamezawa, Hiroyuki/亀澤 寛
> 之; mel@....ul.ie; Hansen, Dave; matt@...eblueprint.co.uk
> Subject: Re: [PATCH v3 2/2] mm: Introduce kernelcore=mirror option
> 
> On 2015/12/11 13:53, Izumi, Taku wrote:
> 
> > Dear Xishi,
> >
> >> Hi Taku,
> >>
> >> Whether it is possible that we rewrite the fallback function in buddy system
> >> when zone_movable and mirrored_kernelcore are both enabled?
> >
> >   What does "when zone_movable and mirrored_kernelcore are both enabled?" mean ?
> >
> >   My patchset just provides a new way to create ZONE_MOVABLE.
> >
> 
> Hi Taku,
> 
> I mean when zone_movable is from kernelcore=mirror, not kernelcore=nn[KMG].

  I'm not quite sure what you are saying, but if you want to screen user memory
  so that one is allocated from mirrored zone and another is from non-mirrored zone,
  I think it is possible to reuse my patchset.

  Sincerely,
  Taku Izumi

> Thanks,
> Xishi Qiu
> 
> >   Sincerely,
> >   Taku Izumi
> >>
> >> It seems something like that we add a new zone but the name is zone_movable,
> >> not zone_mirror. And the prerequisite is that we won't enable these two
> >> features(movable memory and mirrored memory) at the same time. Thus we can
> >> reuse the code of movable zone.
> >>
> >
> > --
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> > .
> >
> 
> 

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