From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: npiggin@suse.de, akpm@linux-foundation.org,
Nishanth Aravamudan <nacc@us.ibm.com>,
linux-mm@kvack.org, kniht@us.ibm.com, abh@cray.com,
joachim.deguara@amd.com
Subject: Re: [patch 14/21] x86: add hugepagesz option on 64-bit
Date: Tue, 03 Jun 2008 12:00:51 -0700 [thread overview]
Message-ID: <1212519651.8505.36.camel@nimitz.home.sr71.net> (raw)
In-Reply-To: <20080603182413.GJ20824@one.firstfloor.org>
On Tue, 2008-06-03 at 20:24 +0200, Andi Kleen wrote:
> On Tue, Jun 03, 2008 at 10:48:02AM -0700, Dave Hansen wrote:
> > First of all, it seems a bit silly to require that users spell out all
> > of the huge page sizes at boot. Shouldn't we allow the small sizes to
> > be runtime-added as well
>
> They are already for most systems where you have only two
> hpage sizes. That is because the legacy hpage size is always
> added and you can still allocate pages for it using the sysctl. And if
> you want to prereserve at boot you'll have to spell the size out
> explicitely anyways.
Yeah, it doesn't make much sense if you're looking at x86 with 2/4MB and
1GB. But, for ppc or ia64, you might have actual chances at runtime to
allocate huge pages, even for non-default sizes.
-- Dave
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next prev parent reply other threads:[~2008-06-03 19:01 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-03 9:59 [patch 00/21] hugetlb multi size, giant hugetlb support, etc npiggin
2008-06-03 9:59 ` [patch 01/21] hugetlb: factor out prep_new_huge_page npiggin
2008-06-03 9:59 ` [patch 02/21] hugetlb: modular state npiggin
2008-06-03 10:58 ` [patch 02/21] hugetlb: modular state (take 2) Nick Piggin
2008-06-03 9:59 ` [patch 03/21] hugetlb: multiple hstates npiggin
2008-06-03 10:00 ` [patch 04/21] hugetlbfs: per mount hstates npiggin
2008-06-03 10:00 ` [patch 05/21] hugetlb: new sysfs interface npiggin
2008-06-03 10:00 ` [patch 06/21] hugetlb: abstract numa round robin selection npiggin
2008-06-03 10:00 ` [patch 07/21] mm: introduce non panic alloc_bootmem npiggin
2008-06-03 10:00 ` [patch 08/21] mm: export prep_compound_page to mm npiggin
2008-06-03 10:00 ` [patch 09/21] hugetlb: support larger than MAX_ORDER npiggin
2008-06-03 10:00 ` [patch 10/21] hugetlb: support boot allocate different sizes npiggin
2008-06-03 10:00 ` [patch 11/21] hugetlb: printk cleanup npiggin
2008-06-03 10:00 ` [patch 12/21] hugetlb: introduce pud_huge npiggin
2008-06-03 10:00 ` [patch 13/21] x86: support GB hugepages on 64-bit npiggin
2008-06-03 10:00 ` [patch 14/21] x86: add hugepagesz option " npiggin
2008-06-03 17:48 ` Dave Hansen
2008-06-03 18:24 ` Andi Kleen
2008-06-03 18:59 ` Dave Hansen
2008-06-03 20:57 ` Andi Kleen
2008-06-03 21:27 ` Dave Hansen
2008-06-04 0:06 ` Andi Kleen
2008-06-04 1:04 ` Nick Piggin
2008-06-04 16:01 ` Dave Hansen
2008-06-06 16:09 ` Dave Hansen
2008-06-05 23:15 ` Nishanth Aravamudan
2008-06-06 0:29 ` Andi Kleen
2008-06-04 1:10 ` Nick Piggin
2008-06-05 23:12 ` Nishanth Aravamudan
2008-06-05 23:23 ` Nishanth Aravamudan
2008-06-03 19:00 ` Dave Hansen [this message]
2008-06-03 10:00 ` [patch 15/21] hugetlb: override default huge page size npiggin
2008-06-03 10:00 ` [patch 16/21] hugetlb: allow arch overried hugepage allocation npiggin
2008-06-03 10:00 ` [patch 17/21] powerpc: function to allocate gigantic hugepages npiggin
2008-06-03 10:00 ` [patch 18/21] powerpc: scan device tree for gigantic pages npiggin
2008-06-03 10:00 ` [patch 19/21] powerpc: define support for 16G hugepages npiggin
2008-06-03 10:00 ` [patch 20/21] fs: check for statfs overflow npiggin
2008-06-03 10:00 ` [patch 21/21] powerpc: support multiple hugepage sizes npiggin
2008-06-03 10:29 ` [patch 1/1] x86: get_user_pages_lockless support 1GB hugepages Nick Piggin
2008-06-03 10:57 ` [patch 00/21] hugetlb multi size, giant hugetlb support, etc Nick Piggin
2008-06-06 17:12 ` Andy Whitcroft
2008-06-04 8:29 ` Andrew Morton
2008-06-04 9:35 ` Nick Piggin
2008-06-04 9:46 ` Andrew Morton
2008-06-04 11:04 ` Nick Piggin
2008-06-04 11:33 ` Nick Piggin
2008-06-04 11:57 ` Andi Kleen
2008-06-04 18:39 ` Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2008-06-04 11:29 [patch 00/21] hugetlb patches resend npiggin
2008-06-04 11:29 ` [patch 14/21] x86: add hugepagesz option on 64-bit npiggin
2008-06-04 17:51 ` Randy Dunlap
2008-06-05 2:01 ` Nick Piggin
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