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Date:      Thu, 26 May 2016 21:51:40 +0000
From:      Marcin Cieslak <saper@saper.info>
To:        =?ISO-8859-15?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
Cc:        freebsd-xen@freebsd.org
Subject:   Re: Leftover (null) domUs
Message-ID:  <alpine.BSF.2.11.1605262151040.2130@z.fncre.vasb>
In-Reply-To: <20160526151025.we5erunbf5dsmejh@mac>
References:  <alpine.BSF.2.11.1605231935570.2130@z.fncre.vasb> <20160526151025.we5erunbf5dsmejh@mac>

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On Thu, 26 May 2016, Roger Pau Monné wrote:

> On Mon, May 23, 2016 at 07:38:42PM +0000, Marcin Cieslak wrote:
> > Hello,
> > 
> > sometimes (rarely) zombie domains are left over after "xl destroy":
> > 
> > # xl list
> > Name                                        ID   Mem VCPUs  State   Time(s)
> > Domain-0                                     0  3270     1     r-----   28887.1
> > (null)                                       7     0     1     --ps-d     769.7
> > (null)                                      34     0     2     --p--d       5.3
> > 
> > both are HVMs runing on r299012, (#7 was HVM FreeBSD guest, #34 Windows 2016 Server).
> > 
> > Recent "xl dmesg entries":
> > 
> > (XEN) mm.c:2010:d0v0 Error pfn 12b0a5: rd=ffff8304122e4000, od=0000000000000000, caf=180000000000000, taf=0000000000000001
> > (XEN) mm.c:2010:d0v0 Error pfn 12b0a4: rd=ffff8304122e4000, od=0000000000000000, caf=180000000000000, taf=0000000000000001
> > (XEN) mm.c:2010:d0v0 Error pfn 12b0a3: rd=ffff8304122e4000, od=0000000000000000, caf=180000000000000, taf=0000000000000001
> > (XEN) mm.c:2010:d0v0 Error pfn 12b0a2: rd=ffff8304122e4000, od=0000000000000000, caf=180000000000000, taf=0000000000000001
> 
> Right, can you paste the output of the 'g' debug key when you have only 
> domains in such state?

Thanks, didn't know that one. Will try the next time it happens, fortunately
not very often.

Marcin


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