Messages in this thread | | | Date | Mon, 24 May 2004 17:05:04 +1000 | From | Stephen Rothwell <> | Subject | Re: [PATCH] dynamic addition of virtual disks on PPC64 iSeries |
| |
Hi Andrew,
On Sun, 23 May 2004 23:29:20 -0700 Andrew Morton <akpm@osdl.org> wrote: > > Stephen Rothwell <sfr@canb.auug.org.au> wrote: > > > > This patch allows us to dynamically add virtual disks to an iSeries > > partition. It works like this: after you have created the virtual disk > > file on OS/400 and attached it to the Linux partition, you need to read > > /sys/bus/vio/drivers/viodasd/probe. This will do the probe and list any > > new disks discovered. > > > > This was the nicest way I could think of doing this as the interface to > > the hypervisor is polled ... > > Is it possible to present all the virtual disks as partitions of a single > disk, use the "partition table" to query what is present?
The virtual disks are just that: disks. They present as /dev/iseries/vda etc and have their own partitions. I can't change that, I will get skinned by current users. It was bad enough when I removed the ide emulation hack ... :-)
(Just in case of confusion: the "Linux partition" I referred to above is a logical partition fo the whole machine.)
> Or to generate a hotplug event when a disk is added? Even if there's no > notification to the kernel, it should be possible to generate the hotplug > events in response to a /proc-based trigger.
I guess that would be possible. In this case I am trying to do the minimum change.
> It's a shame you didn't cc linux-kernel on this - the blockdev police would > have better ideas than I.
I have now sent the patch to LKML and cc'd this reply there as well.
-- Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/ [unhandled content-type:application/pgp-signature] | |