[PATCH 4/7] Allow sysfs memory directories to be split
dave at linux.vnet.ibm.com
Wed Jul 14 13:26:56 EST 2010
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.
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