Re: [PATCH 2/2] arm64: mm: make pfn always valid with flat memory

From	Catalin Marinas <catalin.marinas@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 2/2] arm64: mm: make pfn always valid with flat memory
Date	2016-04-12 17:10 +0200
Message-ID	<rn870-W0-7@gated-at.bofh.it> (permalink)
References	<rkux3-hF-3@gated-at.bofh.it> <rkux3-hF-1@gated-at.bofh.it> <rmI2S-4Vk-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Mon, Apr 11, 2016 at 07:08:38PM +0800, Xishi Qiu wrote:
> On 2016/4/5 16:22, Chen Feng wrote:
> 
> > Make the pfn always valid when using flat memory.
> > If the reserved memory is not align to memblock-size,
> > there will be holes in zone.
> > 
> > This patch makes the memory in buddy always in the
> > array of mem-map.
> > 
> > Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
> > Signed-off-by: Fu Jun <oliver.fu@hisilicon.com>
> > ---
> >  arch/arm64/mm/init.c | 7 ++++---
> >  1 file changed, 4 insertions(+), 3 deletions(-)
> > 
> > diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> > index ea989d8..0e1d5b7 100644
> > --- a/arch/arm64/mm/init.c
> > +++ b/arch/arm64/mm/init.c
> > @@ -306,7 +306,8 @@ static void __init free_unused_memmap(void)
> 
> How about let free_unused_memmap() support for CONFIG_SPARSEMEM_VMEMMAP?

We would need extra care to check that the memmap was actually allocated
in the first place.

-- 
Catalin

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[PATCH 2/2] arm64: mm: make pfn always valid with flat memory Chen Feng <puck.chen@hisilicon.com> - 2016-04-05 10:30 +0200
  Re: [PATCH 2/2] arm64: mm: make pfn always valid with flat memory Chen Feng <puck.chen@hisilicon.com> - 2016-04-07 09:50 +0200
  Re: [PATCH 2/2] arm64: mm: make pfn always valid with flat memory Xishi Qiu <qiuxishi@huawei.com> - 2016-04-11 13:20 +0200
    Re: [PATCH 2/2] arm64: mm: make pfn always valid with flat memory Catalin Marinas <catalin.marinas@arm.com> - 2016-04-12 17:10 +0200

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