From: Yinghai Lu <yinghai@kernel.org>
To: Seth Jennings <sjenning@linux.vnet.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"H. Peter Anvin" <hpa@zytor.com>, Dave Hansen <dave@sr71.net>,
Nathan Fontenot <nfont@linux.vnet.ibm.com>,
Cody P Schafer <cody@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>
Subject: Re: [RFC][PATCH] drivers: base: dynamic memory block creation
Date: Wed, 14 Aug 2013 16:20:06 -0700 [thread overview]
Message-ID: <CAE9FiQXJ85Nr6F=mn5DgfanwNA2s55=_LyQKbXLrxfTc6yZcAQ@mail.gmail.com> (raw)
In-Reply-To: <20130814215253.GC17423@variantweb.net>
On Wed, Aug 14, 2013 at 2:52 PM, Seth Jennings
<sjenning@linux.vnet.ibm.com> wrote:
> On Wed, Aug 14, 2013 at 02:37:26PM -0700, Yinghai Lu wrote:
> If I am understanding you correctly, you are suggesting we make the block size
> a boot time tunable. It can't be a runtime tunable since the memory blocks are
> currently created a boot time.
yes.
If could make it to be tunable at run-time, could be much better.
>
> On ppc64, we can't just just choose a memory block size since it must align
> with the underlying LMB (logical memory block) size, set in the hardware ahead
> of time.
assume for x86_64, it now support 46bits physical address. so if we
change to 2G, then
big system will only need create (1<<15) aka 32k entries in /sys at most.
Thanks
Yinghai
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next prev parent reply other threads:[~2013-08-14 23:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-14 19:31 Seth Jennings
2013-08-14 19:40 ` Greg Kroah-Hartman
2013-08-16 19:07 ` Seth Jennings
2013-08-14 19:43 ` Greg Kroah-Hartman
2013-08-14 20:05 ` Dave Hansen
2013-08-14 20:35 ` Greg Kroah-Hartman
2013-08-14 21:16 ` Seth Jennings
2013-08-14 21:37 ` Yinghai Lu
2013-08-14 21:52 ` Seth Jennings
2013-08-14 23:20 ` Yinghai Lu [this message]
2013-08-15 2:12 ` Michael Ellerman
2013-08-14 20:40 ` Nathan Fontenot
2013-08-14 20:47 ` Dave Hansen
2013-08-14 21:14 ` Seth Jennings
2013-08-14 21:36 ` Dave Hansen
2013-08-14 21:37 ` Cody P Schafer
2013-08-14 21:49 ` Dave Hansen
2013-08-15 0:01 ` Rafael J. Wysocki
2013-08-16 18:41 ` Seth Jennings
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