Re: [MirageOS-devel] CT 'xl create' - Loops and Device Model

[Anil Madhavapeddy <anil@xxxxxxxxxx>]

Hi Ahmed,

That behaviour is indeed confusing, but at least explainable. When you specify 
a file, the toolstack is probably spinning up a qemu PV disk backend, and the 
direct device is probably going through blkback directly in the dom0 kernel.

The exact behaviours for filesystem mounts have changed many many times in Xen 
in the past few years, so Dave Scott or Jon Ludlam could confirm this 
hypothesis better than me :-)

-anil

> On 2 Jun 2015, at 10:07, Ahmed Ismail <a.m.ismail@xxxxxxxxxxxx> wrote:
> 
> Hi Anil,
> 
> Thank you for your input.
> Unfortunately, the img-based guest didn't get as far as needed for 
> xenstore-ls to be able to give me any info.
> I had checked Magnus' script, and it was really puzzling because it was the 
> same way with which I had went about creating the non-working img file, and 
> the working LV-based guest.
> 
> Long story short, I finally figured it out.
> It turns out that, for some reason, guest creation fails if you reference a 
> file (the img) but works if you reference it as a device (i.e. the mounted 
> img).
> I don't mind the extra step ;).
> 
> Thank you all for your help!
> 
> Best wishes,
> -- 
> Ahmed
> _______________________________________________
> MirageOS-devel mailing list
> MirageOS-devel@xxxxxxxxxxxxxxxxxxxx
> http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel


_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@xxxxxxxxxxxxxxxxxxxx
http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel