From: Andi Kleen <andi@firstfloor.org>
To: npiggin@suse.de
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
kniht@linux.vnet.ibm.com, nacc@us.ibm.com, abh@cray.com,
wli@holomorphy.com
Subject: Re: [patch 00/18] multi size, and giant hugetlb page support, 1GB hugetlb for x86
Date: Wed, 23 Apr 2008 10:05:45 +0200 [thread overview]
Message-ID: <480EEDD9.2010601@firstfloor.org> (raw)
In-Reply-To: <20080423015302.745723000@nick.local0.net>
> Testing-wise, I've changed the registration mechanism so that if you specify
> hugepagesz=1G on the command line, then you do not get the 2M pages by default
> (you have to also specify hugepagesz=2M). Also, when only one hstate is
> registered, all the proc outputs appear unchanged, so this makes it very easy
> to test with.
Are you sure that's a good idea? Just replacing the 2M count in meminfo
with 1G pages is not fully compatible proc ABI wise I think.
I think rather that applications who only know about 2M pages should
see "0" in this case and not be confused by larger pages. And only
applications who are multi page size aware should see the new page
sizes.
If you prefer it you could move all the new page sizes to sysfs
and only ever display the "legacy page size" in meminfo,
but frankly I personally prefer the quite simple and comparatively
efficient /proc/meminfo with multiple numbers interface.
-Andi
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next prev parent reply other threads:[~2008-04-23 8:05 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-23 1:53 [patch 00/18] multi size, and giant hugetlb page support, 1GB hugetlb for x86 npiggin
2008-04-23 1:53 ` [patch 01/18] hugetlb: fix lockdep spew npiggin
2008-04-23 13:06 ` KOSAKI Motohiro
2008-04-23 1:53 ` [patch 02/18] hugetlb: factor out huge_new_page npiggin
2008-04-24 23:49 ` Nishanth Aravamudan
2008-04-24 23:54 ` Nishanth Aravamudan
2008-04-24 23:58 ` Nishanth Aravamudan
2008-04-25 7:10 ` Andi Kleen
2008-04-25 16:54 ` Nishanth Aravamudan
2008-04-25 19:13 ` Christoph Lameter
2008-04-25 19:29 ` Nishanth Aravamudan
2008-04-30 19:16 ` Christoph Lameter
2008-04-30 20:44 ` Nishanth Aravamudan
2008-05-01 19:23 ` Christoph Lameter
2008-05-01 20:25 ` Nishanth Aravamudan
2008-05-01 20:34 ` Christoph Lameter
2008-05-01 21:01 ` Nishanth Aravamudan
2008-05-23 5:03 ` Nick Piggin
2008-04-23 1:53 ` [patch 03/18] mm: offset align in alloc_bootmem npiggin, Yinghai Lu
2008-04-23 1:53 ` [patch 04/18] hugetlb: modular state npiggin
2008-04-23 15:21 ` Jon Tollefson
2008-04-23 15:38 ` Nick Piggin
2008-04-25 17:13 ` Nishanth Aravamudan
2008-05-23 5:02 ` Nick Piggin
2008-05-23 20:48 ` Nishanth Aravamudan
2008-04-23 1:53 ` [patch 05/18] hugetlb: multiple hstates npiggin
2008-04-25 17:38 ` Nishanth Aravamudan
2008-04-25 17:48 ` Nishanth Aravamudan
2008-04-25 17:55 ` Andi Kleen
2008-04-25 17:52 ` Nishanth Aravamudan
2008-04-25 18:10 ` Andi Kleen
2008-04-28 10:13 ` Andy Whitcroft
2008-05-23 5:18 ` Nick Piggin
2008-04-29 17:27 ` Nishanth Aravamudan
2008-05-23 5:19 ` Nick Piggin
2008-04-23 1:53 ` [patch 06/18] hugetlb: multi hstate proc files npiggin
2008-05-02 19:53 ` Nishanth Aravamudan
2008-05-23 5:22 ` Nick Piggin
2008-05-23 20:30 ` Nishanth Aravamudan
2008-04-23 1:53 ` [patch 07/18] hugetlbfs: per mount hstates npiggin
2008-04-25 18:09 ` Nishanth Aravamudan
2008-04-25 20:36 ` Nishanth Aravamudan
2008-04-25 22:39 ` Nishanth Aravamudan
2008-04-28 18:20 ` Adam Litke
2008-04-28 18:46 ` Nishanth Aravamudan
2008-05-23 5:24 ` Nick Piggin
2008-05-23 20:34 ` Nishanth Aravamudan
2008-05-23 22:49 ` Nick Piggin
2008-05-23 23:24 ` Nishanth Aravamudan
2008-04-23 1:53 ` [patch 08/18] hugetlb: multi hstate sysctls npiggin
2008-04-25 18:14 ` Nishanth Aravamudan
2008-05-23 5:25 ` Nick Piggin
2008-05-23 20:27 ` Nishanth Aravamudan
2008-04-25 23:35 ` Nishanth Aravamudan
2008-05-23 5:28 ` Nick Piggin
2008-05-23 10:40 ` Andi Kleen
2008-04-23 1:53 ` [patch 09/18] hugetlb: abstract numa round robin selection npiggin
2008-04-23 1:53 ` [patch 10/18] mm: introduce non panic alloc_bootmem npiggin
2008-04-23 1:53 ` [patch 11/18] mm: export prep_compound_page to mm npiggin
2008-04-23 16:12 ` Andrew Hastings
2008-05-23 5:29 ` Nick Piggin
2008-04-23 1:53 ` [patch 12/18] hugetlbfs: support larger than MAX_ORDER npiggin
2008-04-23 16:15 ` Andrew Hastings
2008-04-23 16:25 ` Andi Kleen
2008-04-25 18:55 ` Nishanth Aravamudan
2008-05-23 5:29 ` Nick Piggin
2008-04-30 21:01 ` Dave Hansen
2008-05-23 5:30 ` Nick Piggin
2008-04-23 1:53 ` [patch 13/18] hugetlb: support boot allocate different sizes npiggin
2008-04-23 16:15 ` Andrew Hastings
2008-04-25 18:40 ` Nishanth Aravamudan
2008-04-25 18:50 ` Andi Kleen
2008-04-25 20:05 ` Nishanth Aravamudan
2008-05-23 5:36 ` Nick Piggin
2008-05-23 6:04 ` Nick Piggin
2008-05-23 20:32 ` Nishanth Aravamudan
2008-05-23 22:45 ` Nick Piggin
2008-05-23 22:53 ` Nishanth Aravamudan
2008-04-23 1:53 ` [patch 14/18] hugetlb: printk cleanup npiggin
2008-04-27 3:32 ` Nishanth Aravamudan
2008-05-23 5:37 ` Nick Piggin
2008-04-23 1:53 ` [patch 15/18] hugetlb: introduce huge_pud npiggin
2008-04-23 1:53 ` [patch 16/18] x86: support GB hugepages on 64-bit npiggin
2008-04-23 1:53 ` [patch 17/18] x86: add hugepagesz option " npiggin
2008-04-30 19:34 ` Nishanth Aravamudan
2008-04-30 19:52 ` Andi Kleen
2008-04-30 20:02 ` Nishanth Aravamudan
2008-04-30 20:19 ` Andi Kleen
2008-04-30 20:23 ` Nishanth Aravamudan
2008-04-30 20:45 ` Andi Kleen
2008-04-30 20:51 ` Nishanth Aravamudan
2008-04-30 20:40 ` Jon Tollefson
2008-04-30 20:48 ` Nishanth Aravamudan
2008-05-23 5:41 ` Nick Piggin
2008-05-23 10:43 ` Andi Kleen
2008-05-23 12:34 ` Nick Piggin
2008-05-23 14:29 ` Andi Kleen
2008-05-23 20:43 ` Nishanth Aravamudan
2008-05-23 20:39 ` Nishanth Aravamudan
2008-05-23 22:52 ` Nick Piggin
2008-04-23 1:53 ` [patch 18/18] hugetlb: my fixes 2 npiggin
2008-04-23 10:48 ` Andi Kleen
2008-04-23 15:36 ` Nick Piggin
2008-04-23 18:49 ` Nishanth Aravamudan
2008-04-23 19:37 ` Andi Kleen
2008-04-23 21:11 ` Nishanth Aravamudan
2008-04-23 21:38 ` Nishanth Aravamudan
2008-04-23 22:06 ` Dave Hansen
2008-04-23 15:20 ` Jon Tollefson
2008-04-23 15:44 ` Nick Piggin
2008-04-23 8:05 ` Andi Kleen [this message]
2008-04-23 15:34 ` [patch 00/18] multi size, and giant hugetlb page support, 1GB hugetlb for x86 Nick Piggin
2008-04-23 15:46 ` Andi Kleen
2008-04-23 15:53 ` Nick Piggin
2008-04-23 16:02 ` Andi Kleen
2008-04-23 16:02 ` Nick Piggin
2008-04-23 18:54 ` Nishanth Aravamudan
2008-04-23 18:52 ` Nishanth Aravamudan
2008-04-24 2:08 ` Nick Piggin
2008-04-24 6:43 ` Nishanth Aravamudan
2008-04-24 7:06 ` Nick Piggin
2008-04-24 17:08 ` Nishanth Aravamudan
2008-04-23 18:43 ` Nishanth Aravamudan
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