Re: Bisected: drivers/block/xen-blkback/xenbus.c:327 xen_blkif_disconnect+0x24f/0x260

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

On 15/09/2022 15:10, Juergen Gross wrote:
> On 15.09.22 14:49, Sander Eikelenboom wrote:
> > Hi Juergen,
> >
> > I'm having trouble booting my DomU's when trying to use a linux-5.19 kernel for
> > both Dom0 and DomU.
> > A dom0 5.19 kernel with a domU 5.18 kernel boots fine.
> > I'm using durect kernel boot to boot the domU guest (kernel=  and ramdisk=
> > parameters).
> >
> > Since both xen-blkback and xen-blkfront could be into play,
> > I bisected this by keeping dom0 fixed as a 5.19 kernel and do the bisecting on
> > the domU kernel.
> >
> > Bisecting leads to commit 4573240f0764ee79d7558d74fc535baa1e110d20 "xen/xenbus:
> > eliminate xenbus_grant_ring()"
> > Reverting this specific commit makes the domU boot fine again.
> >
> > I have added the splat from dom0 kernel below (from using 5.19.8 kernel for both
> > dom0 and domU),
> > the domU does not seem to have any interessting logging,
> > apart from not being able to find the root filesystem.
> >
> > Do you have any ideas ?
> Ouch. What a silly, silly, silly error!
>
> Does the attached patch fix it for you?
>
>
> Juergen
Hi Juergen,

Yes this fixes the problem, thanks !

--
Sander