From: Tejun Heo <tj@kernel.org>
To: Toshi Kani <toshi.kani@hp.com>
Cc: Zhang Yanfei <zhangyanfei.yes@gmail.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Rafael J . Wysocki" <rjw@sisk.pl>,
"lenb@kernel.org" <lenb@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"mingo@elte.hu" <mingo@elte.hu>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
Thomas Renninger <trenn@suse.de>, Yinghai Lu <yinghai@kernel.org>,
Jiang Liu <jiang.liu@huawei.com>,
Wen Congyang <wency@cn.fujitsu.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
"isimatu.yasuaki@jp.fujitsu.com" <isimatu.yasuaki@jp.fujitsu.com>,
"izumi.taku@jp.fujitsu.com" <izumi.taku@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan@kernel.org>,
"mina86@mina86.com" <mina86@mina86.com>,
"gong.chen@linux.intel.com" <gong.chen@linux.intel.com>,
"vasilis.liaskovitis@profitbricks.com"
<vasilis.liaskovitis@profitbricks.com>,
"lwoodman@redhat.com" <lwoodman@redhat.com>,
Rik van Riel <riel@redhat.com>,
"jweiner@redhat.com" <jweiner@redhat.com>,
"prarit@redhat.com" <prarit@redhat.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"imtangchen@gmail.com" <imtangchen@gmail.com>,
Zhang Yanfei <zhangyanfei@cn.fujitsu.com>,
Tang Chen <tangchen@cn.fujitsu.com>
Subject: Re: [PATCH part1 v6 4/6] x86/mem-hotplug: Support initialize page tables in bottom-up
Date: Thu, 10 Oct 2013 12:46:23 -0400 [thread overview]
Message-ID: <20131010164623.GD13276@htj.dyndns.org> (raw)
In-Reply-To: <1381422249.24268.68.camel@misato.fc.hp.com>
Hey,
On Thu, Oct 10, 2013 at 10:24:09AM -0600, Toshi Kani wrote:
> > We're going round and round. You're saying that using SRAT isn't
> > worse than what came before while failing to illustrate how committing
> > to invasive changes would eventually lead to something better. "it
> > isn't worse" isn't much of an argument.
>
> We did avoid moving up the ACPI table init function per your suggestion.
> I guess I do not understand why you still concerned about using SRAT...
As you wrote above, SRAT is not enough to support device granularity.
We need to parse the device hierarchy too before setting up page
tables and one of the previous arguments was "it's only SRAT". It
doesn't instill confidence when there doesn't seem to be much long
term planning going on especially as the general quality of the
patches isn't particularly high. I find it difficult to believe that
this effort as it currently stands is likely to reach full solution
and as such it feels much safer to opt for a simpler, less dangerous
approach for immedate use, for which either approach doesn't make much
of difference.
Thanks.
--
tejun
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next prev parent reply other threads:[~2013-10-10 16:46 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-04 1:56 [PATCH part1 v6 0/6] x86, memblock: Allocate memory near kernel image before SRAT parsed Zhang Yanfei
2013-10-04 1:57 ` [PATCH part1 v6 1/6] memblock: Factor out of top-down allocation Zhang Yanfei
2013-10-04 1:58 ` [PATCH part1 v6 2/6] memblock: Introduce bottom-up allocation mode Zhang Yanfei
2013-10-05 21:30 ` Toshi Kani
2013-10-04 1:59 ` [PATCH part1 v6 3/6] x86/mm: Factor out of top-down direct mapping setup Zhang Yanfei
2013-10-04 2:00 ` [PATCH part1 v6 4/6] x86/mem-hotplug: Support initialize page tables in bottom-up Zhang Yanfei
2013-10-05 22:09 ` Toshi Kani
2013-10-07 0:00 ` H. Peter Anvin
2013-10-07 14:17 ` Zhang Yanfei
2013-10-08 17:36 ` Zhang Yanfei
2013-10-09 16:44 ` Tejun Heo
2013-10-09 17:14 ` Zhang Yanfei
2013-10-09 19:20 ` Tejun Heo
2013-10-09 19:30 ` Dave Hansen
2013-10-09 19:47 ` Tejun Heo
2013-10-09 20:58 ` Toshi Kani
2013-10-09 21:11 ` Tejun Heo
2013-10-09 21:14 ` H. Peter Anvin
2013-10-09 21:45 ` Zhang Yanfei
2013-10-09 23:10 ` H. Peter Anvin
2013-10-09 23:26 ` Zhang Yanfei
2013-10-10 1:20 ` Zhang Yanfei
2013-10-10 0:25 ` Toshi Kani
2013-10-09 23:58 ` Toshi Kani
2013-10-10 1:00 ` Tejun Heo
2013-10-10 14:36 ` Toshi Kani
2013-10-10 15:35 ` Tejun Heo
2013-10-10 16:24 ` Toshi Kani
2013-10-10 16:46 ` Tejun Heo [this message]
2013-10-10 16:50 ` Toshi Kani
2013-10-10 16:55 ` Tejun Heo
2013-10-10 16:59 ` Toshi Kani
2013-10-10 17:12 ` H. Peter Anvin
2013-10-10 19:17 ` Toshi Kani
2013-10-10 22:19 ` Tejun Heo
2013-10-10 23:00 ` Toshi Kani
2013-10-09 21:19 ` Zhang Yanfei
2013-10-09 21:22 ` H. Peter Anvin
2013-10-09 23:30 ` Zhang Yanfei
2013-10-09 19:10 ` Yinghai Lu
2013-10-09 19:23 ` Tejun Heo
2013-10-11 5:27 ` Yinghai Lu
2013-10-11 5:47 ` Zhang Yanfei
2013-10-11 6:33 ` Ingo Molnar
2013-10-11 6:46 ` Zhang Yanfei
2013-10-04 2:01 ` [PATCH part1 v6 5/6] x86, acpi, crash, kdump: Do reserve_crashkernel() after SRAT is parsed Zhang Yanfei
2013-10-05 22:10 ` Toshi Kani
2013-10-04 2:02 ` [PATCH part1 v6 6/6] mem-hotplug: Introduce movable_node boot option Zhang Yanfei
2013-10-05 22:28 ` Toshi Kani
2013-10-06 14:43 ` [PATCH part1 v6 update " Zhang Yanfei
2013-10-06 23:03 ` Toshi Kani
2013-10-08 4:23 ` [PATCH part1 v6 0/6] x86, memblock: Allocate memory near kernel image before SRAT parsed Ingo Molnar
2013-10-08 15:28 ` Zhang Yanfei
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