From: Andrea Arcangeli <andrea@suse.de>
To: Hugh Dickins <hugh@veritas.com>
Cc: Dan Aloni <da-x@monatomic.org>, Nick Piggin <npiggin@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
tee@sgi.com, holt@sgi.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [rfc] no ZERO_PAGE?
Date: Wed, 4 Apr 2007 18:07:15 +0200 [thread overview]
Message-ID: <20070404160715.GJ19587@v2.random> (raw)
In-Reply-To: <Pine.LNX.4.64.0704041636550.22242@blonde.wat.veritas.com>
On Wed, Apr 04, 2007 at 04:41:46PM +0100, Hugh Dickins wrote:
> Nor I: I meant that anonymous readfault should
> (perhaps) mark the pte writable but clean.
Sorry I assumed when you said clean you implied readonly... Though
we'd need to differentiate the archs where the dirty bit is not set by
the hardware. Overall I'm unsure it worth it. Currently the VM
definitely wouldn't cope with a writeable and clean anonymous page, so
we'd need to change shrink_page_list and try_to_unmap_anon to make it
work. Likely it won't be measurable, so it may be a nice feature to
have from a theoretical point of view, in practice I doubt it matters.
--
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next prev parent reply other threads:[~2007-04-04 16:07 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-29 7:58 [rfc][patch 1/2] mm: dont account ZERO_PAGE Nick Piggin
2007-03-29 7:58 ` [rfc][patch 2/2] mips: reinstate move_pte Nick Piggin
2007-03-29 17:49 ` Linus Torvalds
2007-03-29 13:10 ` [rfc][patch 1/2] mm: dont account ZERO_PAGE Hugh Dickins
2007-03-30 1:46 ` Nick Piggin
2007-03-30 2:59 ` Robin Holt
2007-03-30 3:09 ` Nick Piggin
2007-03-30 9:23 ` Robin Holt
2007-03-30 2:40 ` Nick Piggin
2007-04-04 3:37 ` [rfc] no ZERO_PAGE? Nick Piggin
2007-04-04 9:45 ` Hugh Dickins
2007-04-04 10:24 ` Nick Piggin
2007-04-04 12:27 ` Andrea Arcangeli
2007-04-04 13:55 ` Dan Aloni
2007-04-04 14:14 ` Andrea Arcangeli
2007-04-04 14:44 ` Dan Aloni
2007-04-04 15:03 ` Hugh Dickins
2007-04-04 15:34 ` Andrea Arcangeli
2007-04-04 15:41 ` Hugh Dickins
2007-04-04 16:07 ` Andrea Arcangeli [this message]
2007-04-04 16:14 ` Linus Torvalds
2007-04-04 15:27 ` Andrea Arcangeli
2007-04-04 16:15 ` Dan Aloni
2007-04-04 16:48 ` Andrea Arcangeli
2007-04-04 12:45 ` Hugh Dickins
2007-04-04 13:05 ` Andrea Arcangeli
2007-04-04 13:32 ` Hugh Dickins
2007-04-04 13:40 ` Andrea Arcangeli
2007-04-04 15:35 ` Linus Torvalds
2007-04-04 15:48 ` Andrea Arcangeli
2007-04-04 16:09 ` Linus Torvalds
2007-04-04 16:23 ` Andrea Arcangeli
2007-04-04 16:10 ` Hugh Dickins
2007-04-04 16:31 ` Andrea Arcangeli
2007-04-04 22:07 ` Valdis.Kletnieks
2007-04-04 16:32 ` Eric Dumazet
2007-04-04 17:02 ` Linus Torvalds
2007-04-04 19:15 ` Andrew Morton
2007-04-04 20:11 ` David Miller, Linus Torvalds
2007-04-04 20:50 ` Andrew Morton
2007-04-05 2:03 ` Nick Piggin
2007-04-05 5:23 ` Andrea Arcangeli
2007-04-04 22:05 ` Valdis.Kletnieks
2007-04-05 0:27 ` Linus Torvalds
2007-04-05 1:25 ` Valdis.Kletnieks
2007-04-05 2:30 ` Nick Piggin
2007-04-05 5:37 ` William Lee Irwin III
2007-04-05 17:23 ` Valdis.Kletnieks
2007-04-05 4:47 ` Nick Piggin
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