Re: The imsm regression tests fail

[Kinga Tanska <kinga.tanska@linux.intel.com>]

On Thu, 3 Aug 2023 19:41:47 +0800
Xiao Ni <xni@redhat.com> wrote:

> On Thu, Aug 3, 2023 at 3:12 PM Mariusz Tkaczyk
> <mariusz.tkaczyk@linux.intel.com> wrote:
> >
> > On Thu, 3 Aug 2023 11:27:57 +0800
> > Xiao Ni <xni@redhat.com> wrote:
> >  
> > > Hi Mariusz
> > >
> > > Now most imsm regression tests fail.
> > >
> > > +++ /home/mdadm/mdadm --quiet --create --run /dev/md/vol0
> > > --auto=md --level=0 --size=5120 --chunk=64 --raid-disks=3
> > > /dev/loop0 /dev/loop1 /dev/loop2 --auto=yes
> > > +++ rv=0
> > > +++ case $* in
> > > +++ cat /var/tmp/stderr
> > > mdadm: timeout waiting for /dev/md/vol0
> > >
> > > +++ echo '**Fatal**: Array member /dev/md/vol0 not found'
> > > **Fatal**: Array member /dev/md/vol0 not found
> > >
> > > Could you have a look at this problem?
> > >
> > > Best Regards
> > > Xiao
> > >  
> >
> > Hi Xiao,
> > Please provide (I guess it is md126):
> > # mdadm -D --export /dev/md126
> >
> > If there is no MD_DEVNAME property then udev has no content to make
> > the link.
> >
> > Do you have this one applied?
> > https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=ef6236da232e968dcf08b486178cd20d5ea97e2a
> >
> > Thanks,
> > Mariusz
> >  
> 
> Hi Mariusz
> 
> I re-complied the codes and the failure disappeared. Thanks for your
> feedback.
> 
> Regards
> Xiao
> 

Hi,

I've met similar issue, there was a timeout while creating a
container.
I've realized that I have been used IMSM_DEVNAME_AS_SERIAL flag while
creating a container, but I haven't exported this flag globally. Udev
has not this flag set while "mdadm --detail --no-devices --export
/dev/md127" was called, and, from some reason, mdadm do not fill
MD_DEVNAME property in this case, and, as a result, do not create a
link.
I'm looking for a root cause in mdadm now, why MD_DEVNAME property is
not set always. If you have used this flag to test, it may be the
same issue.

Regards,
Kinga Tanska