From: Christoph Lameter <clameter@sgi.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: akpm@osdl.org, linux-mm@kvack.org, pj@sgi.com, jes@sgi.com,
apw@shadowen.org
Subject: Re: [1/3] Add __GFP_THISNODE to avoid fallback to other nodes and ignore cpuset/memory policy restrictions.
Date: Tue, 8 Aug 2006 19:00:47 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0608081857560.31758@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20060809103433.99f14cb7.kamezawa.hiroyu@jp.fujitsu.com>
On Wed, 9 Aug 2006, KAMEZAWA Hiroyuki wrote:
> Hm, passing a nodemask as argment to alloc_page_???()is too more complicated
> than GFP_THISNODE ? (it will increase # of args but...)
The node is passed via alloc_pages_node() etc already. If one uses
__GFP_THISNODE with alloc_pages_node() then you will get the page on the
indicated node regardless of cpusets. Currently cpuset constraints may
lead to allocation on a different node.
If you use __GFP_THISNODE with an allocator that does not allow the
specification of a node then you will get memory from the local node
without regard to memory policies and cpuset constraints. In that usage
scenario __GFP_THISNODE then behaves as if it would be
Andy's GFP_LOCAL_NODE.
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next prev parent reply other threads:[~2006-08-09 2:00 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-08 16:33 Christoph Lameter
2006-08-08 16:34 ` [2/3] sys_move_pages: Do not fall back to other nodes Christoph Lameter
2006-08-08 16:37 ` [3/3] Guarantee that the uncached allocator gets pages on the correct node Christoph Lameter
2006-08-08 16:56 ` [1/3] Add __GFP_THISNODE to avoid fallback to other nodes and ignore cpuset/memory policy restrictions Andy Whitcroft
2006-08-08 17:01 ` Christoph Lameter
2006-08-08 16:59 ` Mel Gorman
2006-08-08 17:03 ` Christoph Lameter
2006-08-08 17:16 ` Mel Gorman
2006-08-08 17:51 ` Christoph Lameter
2006-08-08 17:47 ` Paul Jackson
2006-08-08 17:59 ` Christoph Lameter
2006-08-08 18:18 ` Paul Jackson
2006-08-08 18:49 ` Christoph Lameter
2006-08-08 20:35 ` Paul Jackson
2006-08-09 9:33 ` Mel Gorman
2006-08-09 1:34 ` KAMEZAWA Hiroyuki
2006-08-09 2:00 ` Christoph Lameter [this message]
2006-08-10 19:41 ` Andrew Morton
2006-08-11 3:16 ` Christoph Lameter
2006-08-11 18:08 ` Andrew Morton
2006-08-11 18:15 ` Christoph Lameter
2006-08-11 18:42 ` Andrew Morton
2006-08-11 18:51 ` Christoph Lameter
2006-08-11 19:15 ` Andrew Morton
2006-08-11 19:16 ` Christoph Lameter
2006-08-11 19:41 ` Dave McCracken
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