[PATCH 4/7] Allow sysfs memory directories to be split
kamezawa.hiroyu at jp.fujitsu.com
Wed Jul 14 10:35:50 EST 2010
On Tue, 13 Jul 2010 10:51:58 -0500
Nathan Fontenot <nfont at austin.ibm.com> wrote:
> > And for what purpose this interface is ? Does this split memory block into 2 pieces
> > of the same size ?? sounds __very__ strange interface to me.
> Yes, this splits the memory_block into two blocks of the same size. This was
> suggested as something we may want to do. From ppc perspective I am not sure we
> would use this.
> The split functionality is not required. The main goal of the patch set is to
> reduce the number of memory sysfs directories created. From a ppc perspective
> the split functionality is not really needed.
Okay, this is an offer from me.
1. I think you can add an boot option as "don't create memory sysfs".
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
Dave, how do you think ? Because ppc guys uses "probe" interface already,
this can be handled... no ?
One problem is that I don't have enough knowledge about configfs..it seems complex.
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