From: Christoph Lameter <clameter@sgi.com>
To: Mel Gorman <mel@skynet.ie>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kamezawa.hiroyu@jp.fujitsu.com
Subject: Re: [PATCH 0/7] Memory Compaction v2
Date: Tue, 19 Jun 2007 12:22:33 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0706191221130.7008@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070619165841.GG17109@skynet.ie>
On Tue, 19 Jun 2007, Mel Gorman wrote:
> Agreed. When I put this together first, I felt I would be able to isolate
> pages of different types on migratelist but that is not the case as migration
> would not be able to tell the difference between a LRU page and a pagetable
> page. I'll rename cc->migratelist to cc->migratelist_lru with the view to
> potentially adding cc->migratelist_pagetable or cc->migratelist_slab later.
Right. The particular issue with moving page table pages or slab pages is
that you do not have a LRU. The page state needs to be established in a
different way and there needs to be mechanism to ensure that the page is
not currently being setup or torn down. For the slab pages I have relied
on page->inuse > 0 to signify a page in use. I am not sure how one would
realize that for page table pages.
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prev parent reply other threads:[~2007-06-19 19:22 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-18 9:28 Mel Gorman
2007-06-18 9:28 ` [PATCH 1/7] KAMEZAWA Hiroyuki hot-remove patches Mel Gorman
2007-06-18 16:56 ` Christoph Lameter
2007-06-19 15:52 ` Mel Gorman
2007-06-18 9:29 ` [PATCH 2/7] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA Mel Gorman
2007-06-18 17:04 ` Christoph Lameter
2007-06-19 15:59 ` Mel Gorman
2007-06-18 9:29 ` [PATCH 3/7] Introduce isolate_lru_page_nolock() as a lockless version of isolate_lru_page() Mel Gorman
2007-06-18 17:05 ` Christoph Lameter
2007-06-18 9:29 ` [PATCH 4/7] Provide metrics on the extent of fragmentation in zones Mel Gorman
2007-06-18 17:07 ` Christoph Lameter
2007-06-18 9:30 ` [PATCH 5/7] Introduce a means of compacting memory within a zone Mel Gorman
2007-06-18 17:18 ` Christoph Lameter
2007-06-19 16:36 ` Mel Gorman
2007-06-19 19:20 ` Christoph Lameter
2007-06-19 12:54 ` Yasunori Goto
2007-06-19 16:49 ` Mel Gorman
2007-06-18 9:30 ` [PATCH 6/7] Add /proc/sys/vm/compact_node for the explicit compaction of a node Mel Gorman
2007-06-18 9:30 ` [PATCH 7/7] Compact memory directly by a process when a high-order allocation fails Mel Gorman
2007-06-18 17:22 ` Christoph Lameter
2007-06-19 16:50 ` Mel Gorman
2007-06-21 12:28 ` Andrew Morton
2007-06-21 13:26 ` Mel Gorman
2007-06-18 17:24 ` [PATCH 0/7] Memory Compaction v2 Christoph Lameter
2007-06-19 16:58 ` Mel Gorman
2007-06-19 19:22 ` Christoph Lameter [this message]
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