From: Dave Hansen <dave.hansen@intel.com>
To: Tejun Heo <tj@kernel.org>, Zhang Yanfei <zhangyanfei.yes@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Rafael J . Wysocki" <rjw@sisk.pl>,
lenb@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
mingo@elte.hu, Toshi Kani <toshi.kani@hp.com>,
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, izumi.taku@jp.fujitsu.com,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan@kernel.org>,
mina86@mina86.com, gong.chen@linux.intel.com,
vasilis.liaskovitis@profitbricks.com, lwoodman@redhat.com,
Rik van Riel <riel@redhat.com>,
jweiner@redhat.com, prarit@redhat.com,
"x86@kernel.org" <x86@kernel.org>,
linux-doc@vger.kernel.org,
"linux-kernel@vger.kernel.org"
<linux-kernel@vger.kernel.org>Linux MM <li>
Subject: Re: [PATCH part1 v6 4/6] x86/mem-hotplug: Support initialize page tables in bottom-up
Date: Wed, 09 Oct 2013 12:30:09 -0700 [thread overview]
Message-ID: <5255AEC1.7040500@intel.com> (raw)
In-Reply-To: <20131009192040.GA5592@mtj.dyndns.org>
On 10/09/2013 12:20 PM, Tejun Heo wrote:
> Realistically tho, why would people be using 4k mappings on 2T
> machines?
CONFIG_DEBUG_PAGEALLOC and CONFIG_KMEMCHECK both disable using >4k
pages. I actually ran in to this on a 1TB machine a few weeks ago:
https://lkml.org/lkml/2013/8/9/546
So it's not a common case for stuff that customers have, but it sure as
*HECK* is needed for debugging.
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WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave.hansen@intel.com>
To: Tejun Heo <tj@kernel.org>, Zhang Yanfei <zhangyanfei.yes@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Rafael J . Wysocki" <rjw@sisk.pl>,
lenb@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
mingo@elte.hu, Toshi Kani <toshi.kani@hp.com>,
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, izumi.taku@jp.fujitsu.com,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan@kernel.org>,
mina86@mina86.com, gong.chen@linux.intel.com,
vasilis.liaskovitis@profitbricks.com, lwoodman@redhat.com,
Rik van Riel <riel@redhat.com>,
jweiner@redhat.com, prarit@redhat.com,
"x86@kernel.org" <x86@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, 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: Wed, 09 Oct 2013 12:30:09 -0700 [thread overview]
Message-ID: <5255AEC1.7040500@intel.com> (raw)
In-Reply-To: <20131009192040.GA5592@mtj.dyndns.org>
On 10/09/2013 12:20 PM, Tejun Heo wrote:
> Realistically tho, why would people be using 4k mappings on 2T
> machines?
CONFIG_DEBUG_PAGEALLOC and CONFIG_KMEMCHECK both disable using >4k
pages. I actually ran in to this on a 1TB machine a few weeks ago:
https://lkml.org/lkml/2013/8/9/546
So it's not a common case for stuff that customers have, but it sure as
*HECK* is needed for debugging.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-10-09 19:30 UTC|newest]
Thread overview: 109+ 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 1:56 ` Zhang Yanfei
2013-10-04 1:57 ` [PATCH part1 v6 1/6] memblock: Factor out of top-down allocation Zhang Yanfei
2013-10-04 1:57 ` Zhang Yanfei
2013-10-04 1:58 ` [PATCH part1 v6 2/6] memblock: Introduce bottom-up allocation mode Zhang Yanfei
2013-10-04 1:58 ` Zhang Yanfei
2013-10-05 21:30 ` Toshi Kani
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 1:59 ` Zhang Yanfei
2013-10-04 2:00 ` [PATCH part1 v6 4/6] x86/mem-hotplug: Support initialize page tables in bottom-up Zhang Yanfei
2013-10-04 2:00 ` Zhang Yanfei
2013-10-05 22:09 ` Toshi Kani
2013-10-05 22:09 ` Toshi Kani
2013-10-07 0:00 ` H. Peter Anvin
2013-10-07 0:00 ` H. Peter Anvin
2013-10-07 14:17 ` Zhang Yanfei
2013-10-07 14:17 ` Zhang Yanfei
2013-10-08 17:36 ` Zhang Yanfei
2013-10-08 17:36 ` Zhang Yanfei
2013-10-08 17:36 ` Zhang Yanfei
2013-10-09 16:44 ` Tejun Heo
2013-10-09 16:44 ` Tejun Heo
2013-10-09 17:14 ` Zhang Yanfei
2013-10-09 17:14 ` Zhang Yanfei
2013-10-09 19:20 ` Tejun Heo
2013-10-09 19:20 ` Tejun Heo
2013-10-09 19:30 ` Dave Hansen [this message]
2013-10-09 19:30 ` Dave Hansen
2013-10-09 19:47 ` Tejun Heo
2013-10-09 19:47 ` Tejun Heo
2013-10-09 20:58 ` Toshi Kani
2013-10-09 20:58 ` Toshi Kani
2013-10-09 21:11 ` Tejun Heo
2013-10-09 21:11 ` Tejun Heo
2013-10-09 21:14 ` H. Peter Anvin
2013-10-09 21:14 ` H. Peter Anvin
2013-10-09 21:45 ` Zhang Yanfei
2013-10-09 21:45 ` Zhang Yanfei
2013-10-09 23:10 ` H. Peter Anvin
2013-10-09 23:10 ` H. Peter Anvin
2013-10-09 23:26 ` Zhang Yanfei
2013-10-09 23:26 ` Zhang Yanfei
2013-10-10 1:20 ` Zhang Yanfei
2013-10-10 1:20 ` Zhang Yanfei
2013-10-10 1:20 ` Zhang Yanfei
2013-10-10 0:25 ` Toshi Kani
2013-10-10 0:25 ` Toshi Kani
2013-10-09 23:58 ` Toshi Kani
2013-10-09 23:58 ` Toshi Kani
2013-10-10 1:00 ` Tejun Heo
2013-10-10 1:00 ` Tejun Heo
2013-10-10 14:36 ` Toshi Kani
2013-10-10 14:36 ` Toshi Kani
2013-10-10 15:35 ` Tejun Heo
2013-10-10 15:35 ` Tejun Heo
2013-10-10 16:24 ` Toshi Kani
2013-10-10 16:24 ` Toshi Kani
2013-10-10 16:46 ` Tejun Heo
2013-10-10 16:46 ` Tejun Heo
2013-10-10 16:50 ` Toshi Kani
2013-10-10 16:50 ` Toshi Kani
2013-10-10 16:55 ` Tejun Heo
2013-10-10 16:55 ` Tejun Heo
2013-10-10 16:59 ` Toshi Kani
2013-10-10 16:59 ` Toshi Kani
2013-10-10 17:12 ` H. Peter Anvin
2013-10-10 17:12 ` H. Peter Anvin
2013-10-10 19:17 ` Toshi Kani
2013-10-10 19:17 ` Toshi Kani
2013-10-10 22:19 ` Tejun Heo
2013-10-10 22:19 ` Tejun Heo
2013-10-10 23:00 ` Toshi Kani
2013-10-10 23:00 ` Toshi Kani
2013-10-09 21:19 ` Zhang Yanfei
2013-10-09 21:19 ` Zhang Yanfei
2013-10-09 21:22 ` H. Peter Anvin
2013-10-09 21:22 ` H. Peter Anvin
2013-10-09 23:30 ` Zhang Yanfei
2013-10-09 23:30 ` Zhang Yanfei
2013-10-09 19:10 ` Yinghai Lu
2013-10-09 19:10 ` Yinghai Lu
2013-10-09 19:23 ` Tejun Heo
2013-10-09 19:23 ` Tejun Heo
2013-10-11 5:27 ` Yinghai Lu
2013-10-11 5:27 ` Yinghai Lu
2013-10-11 5:47 ` Zhang Yanfei
2013-10-11 5:47 ` Zhang Yanfei
2013-10-11 6:33 ` Ingo Molnar
2013-10-11 6:33 ` Ingo Molnar
2013-10-11 6:46 ` Zhang Yanfei
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
2013-10-04 2:01 ` Zhang Yanfei
2013-10-05 22:10 ` Toshi Kani
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
2013-10-04 2:02 ` Zhang Yanfei
2013-10-05 22:28 ` Toshi Kani
2013-10-05 22:28 ` Toshi Kani
2013-10-06 14:43 ` [PATCH part1 v6 update " Zhang Yanfei
2013-10-06 14:43 ` Zhang Yanfei
2013-10-06 14:43 ` Zhang Yanfei
2013-10-06 23:03 ` Toshi Kani
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 4:23 ` Ingo Molnar
2013-10-08 15:28 ` Zhang Yanfei
2013-10-08 15:28 ` Zhang Yanfei
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