From: Andrea Arcangeli <aarcange@redhat.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: linux-mm@kvack.org, Marcelo Tosatti <mtosatti@redhat.com>,
Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>,
Izik Eidus <ieidus@redhat.com>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Nick Piggin <npiggin@suse.de>, Rik van Riel <riel@redhat.com>,
Andi Kleen <andi@firstfloor.org>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ingo Molnar <mingo@elte.hu>, Mike Travis <travis@sgi.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Christoph Lameter <cl@linux-foundation.org>,
Chris Wright <chrisw@sous-sol.org>,
Andrew Morton <akpm@linux-foundation.org>,
bpicco@redhat.com, Christoph Hellwig <chellwig@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH 14 of 31] add pmd mangling generic functions
Date: Thu, 28 Jan 2010 16:57:32 +0100 [thread overview]
Message-ID: <20100128155732.GE1217@random.random> (raw)
In-Reply-To: <20100126194455.GS16468@csn.ul.ie>
On Tue, Jan 26, 2010 at 07:44:55PM +0000, Mel Gorman wrote:
> On Tue, Jan 26, 2010 at 02:52:09PM +0100, Andrea Arcangeli wrote:
> > From: Andrea Arcangeli <aarcange@redhat.com>
> >
> > Some are needed to build but not actually used on archs not supporting
> > transparent hugepages. Others like pmdp_clear_flush are used by x86 too.
> >
>
> If they are not used, why are they needed to build?
Oh well I went extra mile in my last patchset. can re-review the new
version? Maybe it builds on all archs too ;)
But I kept the pmd unused methods implemented as long as long as the
pte counterpart existed. But I ensured the pmd methods defines to
BUG() if TRANSPARENT_HUGEPAGE is null, to be 100% sure nobody uses
them unless it is allowed to. It is needed to build because things
like pmd_write are used in memory.c, but they have to be optimized
away at compile time, so no actual BUG() bytecode should never hit
kernel .text and especially BUG() will make sure it won't hit runtime
in case it does...
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next prev parent reply other threads:[~2010-01-28 15:58 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-26 13:51 [PATCH 00 of 31] Transparent Hugepage support #7 Andrea Arcangeli
2010-01-26 13:51 ` [PATCH 01 of 31] define MADV_HUGEPAGE Andrea Arcangeli
2010-01-26 14:49 ` Rik van Riel
2010-01-26 17:49 ` Mel Gorman
2010-01-27 16:37 ` Hugh Dickins
2010-01-27 17:13 ` Andrea Arcangeli
2010-01-27 17:29 ` Hugh Dickins
2010-01-27 17:45 ` Pekka Enberg
2010-01-27 21:44 ` Arnd Bergmann
2010-01-26 13:51 ` [PATCH 02 of 31] compound_lock Andrea Arcangeli
2010-01-26 14:51 ` Rik van Riel
2010-01-26 15:30 ` Andrea Arcangeli
2010-01-26 15:36 ` Christoph Lameter
2010-01-26 15:51 ` Andrea Arcangeli
2010-01-26 17:50 ` Mel Gorman
2010-01-26 13:51 ` [PATCH 03 of 31] alter compound get_page/put_page Andrea Arcangeli
2010-01-26 15:00 ` Rik van Riel
2010-01-26 15:31 ` Andrea Arcangeli
2010-01-26 16:00 ` Christoph Lameter
2010-01-26 18:02 ` Mel Gorman
2010-01-27 18:58 ` Andrea Arcangeli
2010-01-28 15:23 ` Mel Gorman
2010-01-26 13:51 ` [PATCH 04 of 31] update futex compound knowledge Andrea Arcangeli
2010-01-26 16:12 ` Rik van Riel
2010-01-26 17:10 ` Andrea Arcangeli
2010-01-26 19:48 ` Rik van Riel
2010-01-26 18:37 ` Mel Gorman
2010-01-27 19:45 ` Andrea Arcangeli
2010-01-28 15:33 ` Mel Gorman
2010-01-28 15:57 ` Andrea Arcangeli
2010-01-26 13:52 ` [PATCH 05 of 31] fix bad_page to show the real reason the page is bad Andrea Arcangeli
2010-01-26 16:13 ` Rik van Riel
2010-01-26 18:38 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 06 of 31] clear compound mapping Andrea Arcangeli
2010-01-26 16:13 ` Rik van Riel
2010-01-26 18:39 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 07 of 31] add native_set_pmd_at Andrea Arcangeli
2010-01-26 16:14 ` Rik van Riel
2010-01-26 19:10 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 08 of 31] add pmd paravirt ops Andrea Arcangeli
2010-01-26 16:43 ` Rik van Riel
2010-01-26 19:13 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 09 of 31] no paravirt version of pmd ops Andrea Arcangeli
2010-01-26 16:46 ` Rik van Riel
2010-01-26 19:15 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 10 of 31] export maybe_mkwrite Andrea Arcangeli
2010-01-26 16:56 ` Rik van Riel
2010-01-26 19:23 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 11 of 31] comment reminder in destroy_compound_page Andrea Arcangeli
2010-01-26 16:59 ` Rik van Riel
2010-01-26 19:24 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 12 of 31] config_transparent_hugepage Andrea Arcangeli
2010-01-26 17:03 ` Rik van Riel
2010-01-26 19:34 ` Mel Gorman
2010-01-27 19:54 ` Andrea Arcangeli
2010-01-28 15:34 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 13 of 31] add pmd mangling functions to x86 Andrea Arcangeli
2010-01-26 17:11 ` Rik van Riel
2010-01-26 19:41 ` Mel Gorman
2010-01-27 19:59 ` Andrea Arcangeli
2010-01-26 13:52 ` [PATCH 14 of 31] add pmd mangling generic functions Andrea Arcangeli
2010-01-26 17:14 ` Rik van Riel
2010-01-26 19:44 ` Mel Gorman
2010-01-28 15:57 ` Andrea Arcangeli [this message]
2010-01-26 13:52 ` [PATCH 15 of 31] special pmd_trans_* functions Andrea Arcangeli
2010-01-26 17:20 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 16 of 31] bail out gup_fast on splitting pmd Andrea Arcangeli
2010-01-26 17:21 ` Rik van Riel
2010-01-26 19:50 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 17 of 31] pte alloc trans splitting Andrea Arcangeli
2010-01-26 17:24 ` Rik van Riel
2010-01-26 19:53 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 18 of 31] add pmd mmu_notifier helpers Andrea Arcangeli
2010-01-26 17:24 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 19 of 31] clear page compound Andrea Arcangeli
2010-01-26 17:25 ` Rik van Riel
2010-01-26 19:56 ` Mel Gorman
2010-01-27 22:51 ` Andrea Arcangeli
2010-01-26 13:52 ` [PATCH 20 of 31] add pmd_huge_pte to mm_struct Andrea Arcangeli
2010-01-26 17:48 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 21 of 31] split_huge_page_mm/vma Andrea Arcangeli
2010-01-26 17:34 ` Mel Gorman
2010-01-26 19:49 ` Andrea Arcangeli
2010-01-26 20:03 ` Mel Gorman
2010-01-26 17:58 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 22 of 31] split_huge_page paging Andrea Arcangeli
2010-01-26 18:02 ` Rik van Riel
2010-01-27 18:43 ` Andrea Arcangeli
2010-01-26 20:08 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 23 of 31] clear_copy_huge_page Andrea Arcangeli
2010-01-26 18:14 ` Rik van Riel
2010-01-26 20:10 ` Mel Gorman
2010-01-26 13:52 ` [PATCH 24 of 31] kvm mmu transparent hugepage support Andrea Arcangeli
2010-01-26 18:16 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 25 of 31] transparent hugepage core Andrea Arcangeli
2010-01-26 22:34 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 26 of 31] madvise(MADV_HUGEPAGE) Andrea Arcangeli
2010-01-26 22:50 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 27 of 31] pmd_trans_huge migrate bugcheck Andrea Arcangeli
2010-01-26 22:51 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 28 of 31] memcg compound Andrea Arcangeli
2010-01-26 22:53 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 29 of 31] memcg huge memory Andrea Arcangeli
2010-01-26 22:53 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 30 of 31] transparent hugepage vmstat Andrea Arcangeli
2010-01-26 22:55 ` Rik van Riel
2010-01-28 1:04 ` Andrea Arcangeli
2010-01-28 1:22 ` Rik van Riel
2010-01-26 13:52 ` [PATCH 31 of 31] khugepaged Andrea Arcangeli
2010-01-26 23:04 ` Rik van Riel
2010-01-26 17:55 ` [PATCH 00 of 31] Transparent Hugepage support #7 Michael S. Tsirkin
2010-01-27 0:00 ` Andrea Arcangeli
2010-01-27 0:32 ` Andrea Arcangeli
2010-01-27 0:47 ` Andrea Arcangeli
2010-01-27 20:20 ` Michael S. Tsirkin
2010-01-27 22:58 ` Andrea Arcangeli
-- strict thread matches above, loose matches on Subject: below --
2010-01-28 14:33 [PATCH 00 of 31] Transparent Hugepage support #8 Andrea Arcangeli
2010-01-28 14:33 ` [PATCH 14 of 31] add pmd mangling generic functions Andrea Arcangeli
2010-01-25 17:18 [PATCH 00 of 31] Transparent Hugepage support #6 Andrea Arcangeli
2010-01-25 17:19 ` [PATCH 14 of 31] add pmd mangling generic functions Andrea Arcangeli
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