From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Christoph Lameter <clameter@engr.sgi.com>,
Andy <apw@shadowen.org>, Andrew Morton <akpm@osdl.org>
Subject: Re: [RFC] [PATCH] virtual memmap on sparsemem v3 [0/4] introduction
Date: Sat, 9 Dec 2006 12:51:37 +0100 [thread overview]
Message-ID: <20061209115137.GA10380@osiris.ibm.com> (raw)
In-Reply-To: <20061208155608.14dcd2e5.kamezawa.hiroyu@jp.fujitsu.com>
> Virtual mem_map is not useful for 32bit archs. This uses huge virtual
> address range.
Why? The s390 vmem_map implementation which I sent last week to linux-mm
is merged in the meantime. It supports both 32 and 64 bit.
The main reason is to keep things simple and avoid #ifdef hell.
Since the maximum size of the virtual array is about 16MB it's not much
waste of address space. Actually I just changed the size of the vmalloc
area, so that the maximum supported physical amount of memory is still 1920MB.
next prev parent reply other threads:[~2006-12-09 11:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-08 6:56 [RFC] [PATCH] virtual memmap on sparsemem v3 [0/4] introduction KAMEZAWA Hiroyuki
2006-12-08 7:01 ` [RFC] [PATCH] virtual memmap on sparsemem v3 [1/4] map and unmap KAMEZAWA Hiroyuki
2006-12-09 0:28 ` Andrew Morton
2006-12-09 2:43 ` KAMEZAWA Hiroyuki
2006-12-09 4:52 ` KAMEZAWA Hiroyuki
2006-12-08 7:04 ` [RFC] [PATCH] virtual memmap on sparsemem v3 [2/4] generic virtual mem_map on sparsemem KAMEZAWA Hiroyuki
2006-12-09 12:05 ` Heiko Carstens
2006-12-09 13:17 ` KAMEZAWA Hiroyuki
2006-12-11 6:44 ` KAMEZAWA Hiroyuki
2006-12-08 7:07 ` [RFC] [PATCH] virtual memmap on sparsemem v3 [3/4] static virtual mem_map KAMEZAWA Hiroyuki
2006-12-09 0:30 ` Andrew Morton
2006-12-09 2:49 ` KAMEZAWA Hiroyuki
2006-12-09 3:33 ` Andrew Morton
2006-12-09 3:41 ` KAMEZAWA Hiroyuki
2006-12-09 4:53 ` KAMEZAWA Hiroyuki
2006-12-08 7:08 ` [RFC] [PATCH] virtual memmap on sparsemem v3 [4/4] ia64 support KAMEZAWA Hiroyuki
2006-12-09 4:55 ` KAMEZAWA Hiroyuki
2006-12-09 11:51 ` Heiko Carstens [this message]
2006-12-09 13:21 ` [RFC] [PATCH] virtual memmap on sparsemem v3 [0/4] introduction KAMEZAWA Hiroyuki
2006-12-10 19:47 ` Bob Picco
2006-12-11 0:43 ` KAMEZAWA Hiroyuki
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