Re: dracut does not mount iscsi targets specified using --mount option

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On Mon, 2012-04-23 at 08:54 -0400, Vivek Goyal wrote:
> On Mon, Apr 23, 2012 at 10:37:57AM +0200, Harald Hoyer wrote:
> > Am 23.04.2012 09:53, schrieb Cong Wang:
> > > On Mon, 2012-04-23 at 09:40 +0200, Harald Hoyer wrote:
> > >>
> > >> Just activate the host-only mode "--hostonly" or "-H"
> > >>
> > > 
> > > Well, -H will set host-only mode for all dracut modules, but here we
> > > want to activate host-only mode _only_ for kernel-modules module.
> > > 
> > > For other dracut modules, we use --add to only specify those we need, as
> > > you can see from Vivek's output.
> > > 
> > > 
> > 
> > Why don't you want host-only mode for the other kernel modules?
> 
> I think host-only should be reasonable but there should be scope for
> further optimization. IIUC, host-only will try to include all the modules
> which are needed to mount root and boot the machine. But in kdump, we
> might not want to mount root at all. We just might want to dump vmcore
> over NFS and reboot.

Yes, exactly. The last time I tried host-only, it included more dracut
modules than what we need, thus increased the initrd size.

(The other reason is, as you replied in another email, host-only doesn't
respect --mount, this also means "network" module will not be included
when I dump to NFS but my rootfs is not NFS.)

> 
> So the assumption that we will necessarily mount root is not valid in
> kdump context. I am not sure how much memory saving this extra
> optimization will lead to, but I will try passing -H and do some testing
> and see how size is varying.

Before this, we have to fix -H to work with --mount. ;-)


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