From: Andi Kleen <andi@firstfloor.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nathan Fontenot <nfont@austin.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] memory hotplug disable boot option
Date: Fri, 25 Jun 2010 11:19:13 +0200 [thread overview]
Message-ID: <87d3vfeage.fsf@basil.nowhere.org> (raw)
In-Reply-To: <20100625105340.803C.A69D9226@jp.fujitsu.com> (KOSAKI Motohiro's message of "Fri, 25 Jun 2010 11:04:19 +0900 (JST)")
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> writes:
>> Proposed patch to disable memory hotplug via a boot option,
>> mem_hotplug=[on|off]. The patch only disables memory hotplug in that it
>> prevents the creation of the memory sysfs directories for memory sections.
>>
>> This patch is meant to help alleviate very long boot times on systems with
>> large memory (1+ TB) and many memory sections (10's of thousands).
>
> Why making simple /sys file is so slowly? Couldn't we fix such performance
> problem?
Yes I agree this really needs to be fixed properly, not hacked around
with an option. Nathan can you please post some profile logs of the long
boot times?
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2010-06-25 9:19 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-25 1:06 [PATCH] memory hotplug disable boot option Nathan Fontenot
2010-06-25 2:04 ` KOSAKI Motohiro
2010-06-25 9:19 ` Andi Kleen [this message]
2010-06-25 14:51 ` Nathan Fontenot
2010-06-25 14:56 ` Andi Kleen
2010-06-25 15:21 ` Nathan Fontenot
2010-06-25 15:28 ` Andi Kleen
2010-06-25 16:00 ` Nathan Fontenot
2010-06-28 2:20 ` KOSAKI Motohiro
2010-06-28 4:15 ` Eric W. Biederman
2010-06-28 14:16 ` Andi Kleen
2010-06-28 19:43 ` Eric W. Biederman
2010-06-28 15:02 ` Greg KH
2010-06-28 15:37 ` Nathan Fontenot
2010-06-28 15:44 ` Greg KH
2010-06-29 0:04 ` Dave Hansen
2010-06-29 2:56 ` KOSAKI Motohiro
2010-06-29 15:38 ` Nathan Fontenot
2010-06-30 0:00 ` KOSAKI Motohiro
2010-06-29 16:03 ` Dave Hansen
2010-06-29 18:04 ` Greg KH
2010-06-30 0:32 ` KAMEZAWA Hiroyuki
2010-06-30 15:47 ` Greg KH
2010-07-01 0:31 ` KAMEZAWA Hiroyuki
2010-07-01 3:17 ` Nathan Fontenot
2010-07-01 3:30 ` KAMEZAWA Hiroyuki
2010-07-01 23:28 ` Greg KH
2010-07-01 5:15 ` KAMEZAWA Hiroyuki
2010-07-01 13:23 ` Dave Hansen
2010-07-06 15:20 ` Nathan Fontenot
2010-07-06 15:33 ` Dave Hansen
2010-07-06 15:47 ` Nathan Fontenot
2010-07-01 23:26 ` Greg KH
2010-07-02 5:50 ` KAMEZAWA Hiroyuki
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