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Date: Wed, 05 Nov 2014 07:31:16 -0800
From: Dave Hansen <dave.hansen@intel.com>
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To: Masanari Iida <standby24x7@gmail.com>
CC: Jonathan Corbet <corbet@lwn.net>,
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        linux-mm@kvack.org, lcapitulino@redhat.com
Subject: Re: [PATCH] Documentation: vm: Add 1GB large page support information
References: <1414771317-5721-1-git-send-email-standby24x7@gmail.com>	<5457C6EA.3080809@intel.com> <CALLJCT0fofgUaswpzt1iBqGS1u+fR8L=umwGpV=RG0SvO9TOJA@mail.gmail.com>
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On 11/05/2014 07:21 AM, Masanari Iida wrote:
> Luiz, Dave,
> Thanks for comments.
> 
> I understand that there are some exception cases which doesn't support 1G
> large pages on newer CPUs.
> I like Dave's example, at the same time I would like to add "pdpe1gb flag" in
> the document.
> 
> For example, x86 CPUs normally support 4K and 2M (1G if pdpe1gb flag exist).

Is 1G supported on CPUs that have pdpe1gb and are running a 32-bit kernel?


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Date: Wed, 05 Nov 2014 07:31:16 -0800
From: Dave Hansen <dave.hansen@intel.com>
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Subject: Re: [PATCH] Documentation: vm: Add 1GB large page support information
References: <1414771317-5721-1-git-send-email-standby24x7@gmail.com>	<5457C6EA.3080809@intel.com> <CALLJCT0fofgUaswpzt1iBqGS1u+fR8L=umwGpV=RG0SvO9TOJA@mail.gmail.com>
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To: Masanari Iida <standby24x7@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, linux-mm@kvack.org, lcapitulino@redhat.com

On 11/05/2014 07:21 AM, Masanari Iida wrote:
> Luiz, Dave,
> Thanks for comments.
> 
> I understand that there are some exception cases which doesn't support 1G
> large pages on newer CPUs.
> I like Dave's example, at the same time I would like to add "pdpe1gb flag" in
> the document.
> 
> For example, x86 CPUs normally support 4K and 2M (1G if pdpe1gb flag exist).

Is 1G supported on CPUs that have pdpe1gb and are running a 32-bit kernel?

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