From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Andy Whitcroft <apw@shadowen.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Jon Tollefson <kniht@linux.vnet.ibm.com>,
Mel Gorman <mel@csn.ul.ie>, Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: [PATCH 1/1] hugetlbfs: handle pages higher order than MAX_ORDER
Date: Wed, 08 Oct 2008 19:36:10 +0200 [thread overview]
Message-ID: <87ej2rt2et.fsf@basil.nowhere.org> (raw)
In-Reply-To: <48ECDD37.8050506@linux-foundation.org> (Christoph Lameter's message of "Wed, 08 Oct 2008 11:17:59 -0500")
Christoph Lameter <cl@linux-foundation.org> writes:
>
> But the memmap is contiguous in most cases. FLATMEM, VMEMMAP etc. Its only
> some special sparsemem configurations that couldhave the issue because they
> break up the vmemmap. x86_64 uses VMEMMAP by default. Is this for i386?
i386 doesn't support huge pages > MAX_ORDER. I guess it's for ppc64,
but they should probably just use vmemmap there if they don't already.
-Andi
--
ak@linux.intel.com
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Andy Whitcroft <apw@shadowen.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Jon Tollefson <kniht@linux.vnet.ibm.com>,
Mel Gorman <mel@csn.ul.ie>, Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: [PATCH 1/1] hugetlbfs: handle pages higher order than MAX_ORDER
Date: Wed, 08 Oct 2008 19:36:10 +0200 [thread overview]
Message-ID: <87ej2rt2et.fsf@basil.nowhere.org> (raw)
In-Reply-To: <48ECDD37.8050506@linux-foundation.org> (Christoph Lameter's message of "Wed, 08 Oct 2008 11:17:59 -0500")
Christoph Lameter <cl@linux-foundation.org> writes:
>
> But the memmap is contiguous in most cases. FLATMEM, VMEMMAP etc. Its only
> some special sparsemem configurations that couldhave the issue because they
> break up the vmemmap. x86_64 uses VMEMMAP by default. Is this for i386?
i386 doesn't support huge pages > MAX_ORDER. I guess it's for ppc64,
but they should probably just use vmemmap there if they don't already.
-Andi
--
ak@linux.intel.com
--
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next prev parent reply other threads:[~2008-10-08 17:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-08 9:33 [PATCH 0/1] gigantic compound pages part 2 Andy Whitcroft
2008-10-08 9:33 ` Andy Whitcroft
2008-10-08 9:33 ` [PATCH 1/1] hugetlbfs: handle pages higher order than MAX_ORDER Andy Whitcroft
2008-10-08 9:33 ` Andy Whitcroft
2008-10-08 12:29 ` Nick Piggin
2008-10-08 12:29 ` Nick Piggin
2008-10-13 13:36 ` Andy Whitcroft
2008-10-13 13:36 ` Andy Whitcroft
2008-10-08 14:57 ` Mel Gorman
2008-10-08 14:57 ` Mel Gorman
2008-10-08 16:17 ` Christoph Lameter
2008-10-08 16:17 ` Christoph Lameter
2008-10-08 17:36 ` Andi Kleen [this message]
2008-10-08 17:36 ` Andi Kleen
2008-10-08 18:55 ` Andy Whitcroft
2008-10-08 18:55 ` Andy Whitcroft
2008-10-08 19:35 ` Christoph Lameter
2008-10-08 19:35 ` Christoph Lameter
2008-10-13 13:34 ` Andy Whitcroft
2008-10-13 13:34 ` Andy Whitcroft
2008-10-13 16:04 ` Christoph Lameter
2008-10-13 16:04 ` Christoph Lameter
2008-10-14 7:00 ` Andy Whitcroft
2008-10-14 7:00 ` Andy Whitcroft
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