From: Andrew Morton <akpm@linux-foundation.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: clameter@sgi.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [QUICKLIST 0/4] Arch independent quicklists V2
Date: Tue, 13 Mar 2007 04:47:56 -0800 [thread overview]
Message-ID: <20070313044756.b45649ac.akpm@linux-foundation.org> (raw)
In-Reply-To: <45F68B4B.9020200@yahoo.com.au>
> On Tue, 13 Mar 2007 22:30:19 +1100 Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> We don't actually have to zap_pte_range the entire page table in
> order to free it (IIRC we used to have to, before the 4lpt patches).
I'm trying to remember why we ever would have needed to zero out the pagetable
pages if we're taking down the whole mm? Maybe it's because "oh, the
arch wants to put this page into a quicklist to recycle it", which is
all rather circular.
It would be interesting to look at a) leave the page full of random garbage
if we're releasing the whole mm and b) return it straight to the page allocator.
next prev parent reply other threads:[~2007-03-13 11:48 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-13 7:13 [QUICKLIST 0/4] Arch independent quicklists V2 Christoph Lameter
2007-03-13 7:13 ` [QUICKLIST 1/4] Generic quicklist implementation Christoph Lameter
2007-03-13 9:05 ` Paul Mundt
2007-03-15 20:51 ` Christoph Lameter
2007-03-13 7:13 ` [QUICKLIST 2/4] Quicklist support for i386 Christoph Lameter
2007-03-13 7:13 ` [QUICKLIST 3/4] Quicklist support for x86_64 Christoph Lameter
2007-03-13 7:13 ` [QUICKLIST 4/4] Quicklist support for sparc64 Christoph Lameter
2007-03-13 8:53 ` [QUICKLIST 0/4] Arch independent quicklists V2 Andrew Morton
2007-03-13 8:03 ` Nick Piggin
2007-03-13 11:52 ` Andrew Morton
2007-03-13 11:06 ` Nick Piggin
2007-03-13 12:15 ` Andrew Morton
2007-03-13 11:20 ` Christoph Lameter
2007-03-13 12:30 ` Andrew Morton
2007-03-15 20:23 ` Christoph Lameter
2007-03-13 11:30 ` Nick Piggin
2007-03-13 12:47 ` Andrew Morton [this message]
2007-03-13 12:01 ` Nick Piggin
2007-03-13 13:11 ` Andrew Morton
2007-03-13 12:18 ` Nick Piggin
2007-03-13 17:30 ` Jeremy Fitzhardinge
2007-03-13 20:03 ` Matt Mackall
2007-03-13 20:17 ` Jeremy Fitzhardinge
2007-03-13 20:21 ` Matt Mackall
2007-03-13 21:07 ` David Miller
2007-03-13 21:14 ` Matt Mackall
2007-03-13 21:36 ` Jeremy Fitzhardinge
2007-03-13 21:46 ` Peter Chubb
2007-03-13 21:48 ` David Miller
2007-03-14 1:12 ` William Lee Irwin III
2007-03-15 23:12 ` William Lee Irwin III
2007-03-13 23:58 ` Paul Mackerras
2007-03-13 11:17 ` Christoph Lameter
2007-03-13 12:27 ` Andrew Morton
2007-03-15 20:28 ` Christoph Lameter
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