xend bug? restart = 'never'

xend bug? restart = 'never'

[Jonathan M. McCune]

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Hello,

I'm observing a situation where domU crashes and xend continuously tries 
to restart it.  For example, I have to write commands like this to 
actually get it to stop:

for i in `seq 80 90`; do xm destroy $i; done

I've tried adding restart = "never" and restart = 'never' to the domain 
config file (the file that gets passed to `xm create`).  Is this a known 
issue?  Am I doing something wrong?

Thanks,
-Jon

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Re: xend bug? restart = 'never'

[Ewan Mellor]

On Mon, Oct 10, 2005 at 02:53:53PM -0400, Jonathan M. McCune wrote:

> Hello,
> 
> I'm observing a situation where domU crashes and xend continuously tries 
> to restart it.  For example, I have to write commands like this to 
> actually get it to stop:
> 
> for i in `seq 80 90`; do xm destroy $i; done
> 
> I've tried adding restart = "never" and restart = 'never' to the domain 
> config file (the file that gets passed to `xm create`).  Is this a known 
> issue?  Am I doing something wrong?

It's a bug.  Please use the new config options on_poweroff, on_reboot, and
on_crash (documented in the example configuration files in
tools/examples/xmexample{1,2,3}).  We are supposed to be backwards compatible
with the old restart option, but that is clearly broken.

Ewan.

Re: xend bug? restart = 'never'

[Ewan Mellor]

On Mon, Oct 10, 2005 at 08:41:05PM +0100, Ewan Mellor wrote:

> On Mon, Oct 10, 2005 at 02:53:53PM -0400, Jonathan M. McCune wrote:
> 
> > Hello,
> > 
> > I'm observing a situation where domU crashes and xend continuously tries 
> > to restart it.  For example, I have to write commands like this to 
> > actually get it to stop:
> > 
> > for i in `seq 80 90`; do xm destroy $i; done
> > 
> > I've tried adding restart = "never" and restart = 'never' to the domain 
> > config file (the file that gets passed to `xm create`).  Is this a known 
> > issue?  Am I doing something wrong?
> 
> It's a bug.  Please use the new config options on_poweroff, on_reboot, and
> on_crash (documented in the example configuration files in
> tools/examples/xmexample{1,2,3}).  We are supposed to be backwards compatible
> with the old restart option, but that is clearly broken.

Also, xm shutdown --halt should override any restarting configuration, and
definitively halt the domain.

Ewan.

Re: xend bug? restart = 'never'

[Ewan Mellor]

On Mon, Oct 10, 2005 at 02:53:53PM -0400, Jonathan M. McCune wrote:

> Hello,
> 
> I'm observing a situation where domU crashes and xend continuously tries 
> to restart it.  For example, I have to write commands like this to 
> actually get it to stop:
> 
> for i in `seq 80 90`; do xm destroy $i; done
> 
> I've tried adding restart = "never" and restart = 'never' to the domain 
> config file (the file that gets passed to `xm create`).  Is this a known 
> issue?  Am I doing something wrong?

I've assigned this bug #309.

Ewan.

Re: xend bug? restart = 'never'

[David F Barrera]

On Tue, 2005-10-11 at 00:58 +0100, Ewan Mellor wrote:
> On Mon, Oct 10, 2005 at 02:53:53PM -0400, Jonathan M. McCune wrote:
> 
> > Hello,
> > 
> > I'm observing a situation where domU crashes and xend continuously tries 
> > to restart it.  For example, I have to write commands like this to 
> > actually get it to stop:
> > 
> > for i in `seq 80 90`; do xm destroy $i; done
> > 
> > I've tried adding restart = "never" and restart = 'never' to the domain 
> > config file (the file that gets passed to `xm create`).  Is this a known 
> > issue?  Am I doing something wrong?

I don't know if this is the same thing, but I noticed that my guest
domain (vm1) seems to have died twice and resurrected, leaving zombies
behind.

x235:~ # xm list
Name              ID  Mem(MiB)  CPU  VCPUs  State   Time(s)
Domain-0           0       121    0      1  r-----   3333.5
Zombie-vm1         4         0    1      1  ----cd      0.3
Zombie-1-vm1       5         0    1      1  ----cd      0.3
vm1                6       126    1      1  -b----    745.7
vm2                7       126    1      1  -b----    866.3

I am also seeing this messages on 'xm dmesg':
(XEN) (file=/tmp/xen-unstable.hg/xen/include/asm/mm.h, line=203) Error
pfn 0: rd=ff1ab080, od=ffbfb080, caf=80000002, taf=f0000002
(XEN) DOM2: (file=mm.c, line=350) Could not get page ref for pfn 0
(XEN) DOM2: (file=mm.c, line=2220) Could not get page for mach->phys
update
(XEN) (file=grant_table.c, line=1016) Bad flags (0) or dom (0). (NB.
expected dom 0)
(XEN) (file=grant_table.c, line=791) gnttab_transfer: Transferee has no
reservation headroom (32567,32768) or provided a bad grant ref
(00000000) or is dying (11)
(XEN) (file=grant_table.c, line=1016) Bad flags (0) or dom (0). (NB.
expected dom 0)
(XEN) (file=grant_table.c, line=791) gnttab_transfer: Transferee has no
reservation headroom (32567,32768) or provided a bad grant ref
(00000000) or is dying (11)
(XEN) (file=grant_table.c, line=1016) Bad flags (0) or dom (0). (NB.
expected dom 0)
(XEN) (file=grant_table.c, line=791) gnttab_transfer: Transferee has no
reservation headroom (32567,32768) or provided a bad grant ref
(00000000) or is dying (11)


> 
> I've assigned this bug #309.
> 
> Ewan.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
> 
-- 
Regards,

David F Barrera
Linux Technology Center
Systems and Technology Group, IBM

"The wisest men follow their own direction. "
                                                        Euripides

Re: xend bug? restart = 'never'

[Khoa Huynh]

Ewan Mellor <ewan@xensource.com> wrote on 10/10/2005 06:58:35 PM:

> On Mon, Oct 10, 2005 at 02:53:53PM -0400, Jonathan M. McCune wrote:
>
> > Hello,
> >
> > I'm observing a situation where domU crashes and xend continuously
tries
> > to restart it.  For example, I have to write commands like this to
> > actually get it to stop:
> >
> > for i in `seq 80 90`; do xm destroy $i; done
> >
> > I've tried adding restart = "never" and restart = 'never' to the domain

> > config file (the file that gets passed to `xm create`).  Is this a
known
> > issue?  Am I doing something wrong?
>
> I've assigned this bug #309.
>
> Ewan.

I think this has been changed recently.  If you look at the recent
"example" domain config files in /etc/xen, you'll see that now we
have 3 things to control the behavior when a domain exits:

on_poweroff = 'destroy' (default value)
on_reboot = 'restart' (default value)
on_crash = 'restart' (default value)

As a result, if a domain is crashing, it would be automatically
be restarted (with a different domain ID) by default.  To prevent
a domain from being endlessly restarted after it crashes, you
can set:
on_crash = 'preserve'

The comments in the "example" domain config files given in /etc/xen
provide more info on these parameters and how the original "restart"
parameter is handled under the new scheme.

Regards,

Khoa H.