From: Dave Hansen <dave@linux.vnet.ibm.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/7] Allow sysfs memory directories to be split
Date: Tue, 13 Jul 2010 20:26:56 -0700 [thread overview]
Message-ID: <1279078016.10995.58.camel@nimitz> (raw)
In-Reply-To: <20100714093550.40036034.kamezawa.hiroyu@jp.fujitsu.com>
On Wed, 2010-07-14 at 09:35 +0900, KAMEZAWA Hiroyuki wrote:
> 2. I'd like to write a configfs module for handling memory hotplug even when
> sysfs directroy is not created.
> Because configfs support rmdir/mkdir, the user (ppc's daemon?) has to do
>
> When offlining section X.
> # insmod configfs_memory.ko
> # mount -t configfs none /configfs
> # mkdir /configfs/memoryX
> # echo offline > /configfs/memoryX/state
> # rmdir /configfs/memoryX
>
> And making this operation as the default bahavior for all arch's memory hotplug may
> be better...
>
> Dave, how do you think ? Because ppc guys uses "probe" interface already,
> this can be handled... no ?
I think creating a interface to duplicate the existing sysfs one is a
bad idea. I also think removing the existing sysfs one isn't feasible
since there are users, and it's truly part of the ABI. So, I'm not
really a fan on the configfs interface. :(
I really do think the sysfs interface is fixable. We should at least
give it a good shot before largely duplicating its functionality.
-- Dave
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave@linux.vnet.ibm.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Nathan Fontenot <nfont@austin.ibm.com>,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 4/7] Allow sysfs memory directories to be split
Date: Tue, 13 Jul 2010 20:26:56 -0700 [thread overview]
Message-ID: <1279078016.10995.58.camel@nimitz> (raw)
In-Reply-To: <20100714093550.40036034.kamezawa.hiroyu@jp.fujitsu.com>
On Wed, 2010-07-14 at 09:35 +0900, KAMEZAWA Hiroyuki wrote:
> 2. I'd like to write a configfs module for handling memory hotplug even when
> sysfs directroy is not created.
> Because configfs support rmdir/mkdir, the user (ppc's daemon?) has to do
>
> When offlining section X.
> # insmod configfs_memory.ko
> # mount -t configfs none /configfs
> # mkdir /configfs/memoryX
> # echo offline > /configfs/memoryX/state
> # rmdir /configfs/memoryX
>
> And making this operation as the default bahavior for all arch's memory hotplug may
> be better...
>
> Dave, how do you think ? Because ppc guys uses "probe" interface already,
> this can be handled... no ?
I think creating a interface to duplicate the existing sysfs one is a
bad idea. I also think removing the existing sysfs one isn't feasible
since there are users, and it's truly part of the ABI. So, I'm not
really a fan on the configfs interface. :(
I really do think the sysfs interface is fixable. We should at least
give it a good shot before largely duplicating its functionality.
-- Dave
next prev parent reply other threads:[~2010-07-14 3:27 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-12 15:27 [PATCH 0/7] De-couple sysfs memory directories from memory sections Nathan Fontenot
2010-07-12 15:42 ` [PATCH 1/7] Split the memory_block structure Nathan Fontenot
2010-07-13 6:18 ` KAMEZAWA Hiroyuki
2010-07-13 6:18 ` KAMEZAWA Hiroyuki
2010-07-13 15:44 ` Nathan Fontenot
2010-07-13 15:44 ` Nathan Fontenot
2010-07-13 14:00 ` Brian King
2010-07-13 14:00 ` Brian King
2010-07-13 15:59 ` Nathan Fontenot
2010-07-13 15:59 ` Nathan Fontenot
2010-07-12 15:43 ` [PATCH 2/7] Create the new 'end_phys_index' file Nathan Fontenot
2010-07-12 15:44 ` [PATCH 3/7] Update the [register,unregister]_memory routines Nathan Fontenot
2010-07-13 6:20 ` KAMEZAWA Hiroyuki
2010-07-13 6:20 ` KAMEZAWA Hiroyuki
2010-07-13 15:46 ` Nathan Fontenot
2010-07-13 15:46 ` Nathan Fontenot
2010-07-12 15:45 ` [PATCH 4/7] Allow sysfs memory directories to be split Nathan Fontenot
2010-07-13 6:28 ` KAMEZAWA Hiroyuki
2010-07-13 6:28 ` KAMEZAWA Hiroyuki
2010-07-13 15:51 ` Nathan Fontenot
2010-07-13 15:51 ` Nathan Fontenot
2010-07-14 0:35 ` KAMEZAWA Hiroyuki
2010-07-14 0:35 ` KAMEZAWA Hiroyuki
2010-07-14 3:18 ` Nathan Fontenot
2010-07-14 3:18 ` Nathan Fontenot
2010-07-14 3:25 ` KAMEZAWA Hiroyuki
2010-07-14 3:25 ` KAMEZAWA Hiroyuki
2010-07-14 8:30 ` KAMEZAWA Hiroyuki
2010-07-14 8:30 ` KAMEZAWA Hiroyuki
2010-07-14 3:26 ` Dave Hansen [this message]
2010-07-14 3:26 ` Dave Hansen
2010-07-14 17:16 ` Nathan Fontenot
2010-07-14 17:16 ` Nathan Fontenot
2010-07-12 15:46 ` [PATCH 5/7] update the mutex name in the memory_block struct Nathan Fontenot
2010-07-12 15:47 ` [PATCH 6/7] Update sysfs node routines for new sysfs memory directories Nathan Fontenot
2010-07-12 15:48 ` [PATCH 7/7] Enable multiple memory sections per sysfs memory directory for powerpc/pseries Nathan Fontenot
2010-07-16 7:13 ` [PATCH 0/7] De-couple sysfs memory directories from memory sections Greg KH
2010-07-16 7:13 ` Greg KH
2010-07-16 15:41 ` Nathan Fontenot
2010-07-16 15:41 ` Nathan Fontenot
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