Re: [NEW FEATURE]Partitions on loop device for 2.6
From: Bill Davidsen (davidsen_at_tmr.com)
Date: 03/30/04
- Previous message: Nakajima, Jun: "RE: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Date: Tue, 30 Mar 2004 16:37:44 -0500 (EST) To: BlaisorBlade <blaisorblade_spam@yahoo.it>
On Mon, 29 Mar 2004, BlaisorBlade wrote:
> Alle 22:04, venerd́ 2 gennaio 2004, Bill Davidsen ha scritto:
> > BlaisorBlade wrote:
> > > NEED:
> > > I have the need to loop mount files containing not plain filesystems, but
> > > whole disk images.
> > >
> > > This is especially needed when using User-mode-linux, since to run any
> > > distro installer you must partition the virtual disks(and on the host,
> > > the backing file of the disk contains a partition table).
> > >
> > > Currently this could be done by specifying a positive offset, but letting
> > > the kernel partition code handle this is better, isn't it? Would you ever
> > > accept this feature into stock kernel?
> >
> > UML is on my list of things to learn (as opposed to "try casually and
> > ignore")
> It is something a bit like VMWare. But instead of emulating hardware and
> running an OS inside that, you run a patched Linux kernel that runs as an
> userspace process on the host and provides a virtual machine, which must
> access a virtual disk, which is stored on a file.
> See http://user-mode-linux.sourceforge.net/ for more info.
> > but have you considered using NBD?
> I didn't really know what it was, nor it seems useful for this "as is" (I've
> not really checked). Maybe that sentence means that the server program could
> do the partition parsing?
> --
> cat <<EOSIGN
> Paolo Giarrusso, aka Blaisorblade
> Linux Kernel 2.4.23/2.6.0 on an i686; Linux registered user n. 292729
> EOSIGN
No, I had in mind that using NBD you might be able to do partitions on the
network device, depending on just how much it looks like a real block
device. And since it looks as if just about anything can be a backing
store for NBD I thought it might be useful to export the file or partition
being used as the pseudo-drive and letting the UML kernel then do
partitions on it as it will. While a loopback mount looks like a partition
more than a disk, I believe the NBD actually looks like a drive.
I played with NBD long ago when it was new stuff, but what I did would
have worked as well on a partition or a device, so I have nothing to offer
but the suggestion.
-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Previous message: Nakajima, Jun: "RE: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
|
