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Date:      Mon, 25 Apr 2016 20:50:53 +0000
From:      Marcin Cieslak <saper@saper.info>
To:        =?ISO-8859-15?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
Cc:        freebsd-virtualization@freebsd.org
Subject:   Re: Booting r298488 as Xen Dom0 may break ZFS pool?
Message-ID:  <alpine.BSF.2.11.1604252048220.1768@z.fncre.vasb>
In-Reply-To: <alpine.BSF.2.11.1604252000401.1768@z.fncre.vasb>
References:  <alpine.BSF.2.11.1604232216330.1768@z.fncre.vasb> <20160425084714.64ejioyqgquwu4gw@mac> <alpine.BSF.2.11.1604251906400.1768@z.fncre.vasb> <alpine.BSF.2.11.1604252000401.1768@z.fncre.vasb>

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On Mon, 25 Apr 2016, Marcin Cieslak wrote:

> On Mon, 25 Apr 2016, Marcin Cieslak wrote:
> 
> > On Mon, 25 Apr 2016, Roger Pau Monné wrote:
> > > TBH, I have no idea. Can you also paste the log of the system (Xen + 
> > > FreeBSD) when it fails to boot? If that's not possible, can you at least 
> > > paste the output of `xl dmesg` when booted correctly under Xen?
> 
> I managed to boot it again...
> 
> root@o:~ # xl dmesg
> xc: error: Could not bounce buffer for version hypercall (35 = Resource temporarily unavailabl): Internal error
> xc: error: Could not bounce buffer for version hypercall (35 = Resource temporarily unavailabl): Internal error
> xc: error: Could not bounce buffer for version hypercall (35 = Resource temporarily unavailabl): Internal error
> xc: error: Could not bounce buffer for version hypercall (35 = Resource temporarily unavailabl): Internal error
> xc: error: Could not bounce buffer for version hypercall (35 = Resource temporarily unavailabl): Internal error
> xc: error: Could not bounce buffer for version hypercall (35 = Resource temporarily unavailabl): Internal error
> libxl: error: libxl.c:6121:libxl_xen_console_read_line: reading console ring buffer: Cannot allocate memory

It seems that my problem was ...

vm.max_wired=1

in /boot/loader.conf

instead of

vm.max_wired=-1

Marcin



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