From: Andrea Arcangeli <aarcange@redhat.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Izik Eidus <ieidus@redhat.com>, Nick Piggin <npiggin@suse.de>,
Rik van Riel <riel@redhat.com>,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 2/6] mm: mlocking in try_to_unmap_one
Date: Fri, 13 Nov 2009 12:50:26 +0100 [thread overview]
Message-ID: <20091113115026.GU21482@random.random> (raw)
In-Reply-To: <20091113172453.33CB.A69D9226@jp.fujitsu.com>
On Fri, Nov 13, 2009 at 05:26:14PM +0900, KOSAKI Motohiro wrote:
> Probably we can remove VM_NONLINEAR perfectly. I've never seen real user of it.
Do you mean as a whole or in the mlock logic? databases are using
remap_file_pages on 32bit archs to avoid generating zillon of vmas on
tmpfs scattered mappings. On 64bits it could only be useful to some
emulators but with real shadow paging and nonlinear rmap already
created on shadow pagetables, it looks pretty useless on 64bit archs
to me.
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next prev parent reply other threads:[~2009-11-13 11:50 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-10 21:50 [PATCH 0/6] mm: prepare for ksm swapping Hugh Dickins
2009-11-10 21:51 ` [PATCH 1/6] mm: define PAGE_MAPPING_FLAGS Hugh Dickins
2009-11-19 0:25 ` Rik van Riel
2009-11-10 21:55 ` [PATCH 2/6] mm: mlocking in try_to_unmap_one Hugh Dickins
2009-11-11 7:56 ` KOSAKI Motohiro
2009-11-11 11:36 ` Hugh Dickins
2009-11-13 8:16 ` KOSAKI Motohiro
2009-11-13 8:26 ` KOSAKI Motohiro
2009-11-13 11:50 ` Andrea Arcangeli [this message]
2009-11-13 18:00 ` KOSAKI Motohiro
2009-11-15 22:37 ` Hugh Dickins
2009-11-17 2:00 ` KOSAKI Motohiro
2009-11-18 16:32 ` Hugh Dickins
2009-11-13 6:30 ` KOSAKI Motohiro
2009-11-15 22:16 ` Hugh Dickins
2009-11-16 23:34 ` KOSAKI Motohiro
2009-11-10 21:59 ` [PATCH 3/6] mm: CONFIG_MMU for PG_mlocked Hugh Dickins
2009-11-11 1:22 ` KOSAKI Motohiro
2009-11-11 10:48 ` Hugh Dickins
2009-11-11 12:38 ` Andi Kleen
2009-11-10 22:00 ` [PATCH 4/6] mm: pass address down to rmap ones Hugh Dickins
2009-11-10 22:02 ` [PATCH 5/6] mm: stop ptlock enlarging struct page Hugh Dickins
2009-11-10 22:09 ` Peter Zijlstra
2009-11-10 22:24 ` Hugh Dickins
2009-11-10 22:14 ` Peter Zijlstra
2009-11-10 22:29 ` Hugh Dickins
2009-11-10 22:06 ` [PATCH 6/6] mm: sigbus instead of abusing oom Hugh Dickins
2009-11-11 2:37 ` KAMEZAWA Hiroyuki
2009-11-11 2:42 ` KOSAKI Motohiro
2009-11-11 4:35 ` Wu Fengguang
2009-11-11 5:51 ` Minchan Kim
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