Re: Debian 10, xen 4.11 reliability

[Adam Goryachev <mailinglists@xxxxxxxxxxxxxxxxxxxxxx>]

On 14/7/20 03:02, Hans van Kranenburg wrote:
> Hi Casper,
>
> On 7/9/20 10:45 AM, Casper wrote:
> > I have used Debian/Xen dom0 for many years, Debian 7, 3.2.41 kernel with
> > Xen 4.1.4 on some servers still work very reliable with no problems,
> > only wanted to change new hard discs pushed me to install new Debian 10
> > with Xen packages to newer version.
> >
> > Where I reinstall Debian 10, latest 4.19 kernel it comes with Xen
> > 4.11.4-pre all crashes in 1-2weeks. In start I was blaming HW, but now
> > it repeats in old reliable servers too. My config is I have 2-3 hard
> > discs per server node and RAID1 with sw md raid, it crashes with md lost
> > access for disc. After reboot all works as it should.
> >
> > I tested different HW and discs, all the same problems.
> > Loads are no big, just few testing DomU nodes.
> > Any suggestion? I`m currently running latest Debian kernel 4.19 was
> > thinking to downgrade to test different kernel.
> > Or problem with Debian Xen package as it not so popular anymore?
> > Any suggestion what to test to figure out problem?
BTW, I don't think is a general rule that Debian 10.4 with packages Xen 
4.11 doesn't work. I have a couple of Debian 11 boxes running multiple 
DomU's and they are working well:
ii  libxencall1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
runtime library - libxencall
ii  libxendevicemodel1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         
Xen runtime libraries - libxendevicemodel
ii  libxenevtchn1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
runtime libraries - libxenevtchn
ii  libxenforeignmemory1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 
i386         Xen runtime libraries - libxenforeignmemory
ii  libxengnttab1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
runtime libraries - libxengnttab
ii  libxenmisc4.11:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
runtime libraries - miscellaneous, versioned ABI
ii  libxenstore3.0:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
runtime libraries - libxenstore
ii  libxentoolcore1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         
Xen runtime libraries - libxentoolcore
ii  libxentoollog1:i386 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
runtime libraries - libxentoollog
ii  xen-hypervisor-4.11-amd64 4.11.3+24-g14b62ab3e5-1~deb10u1 
i386         Xen Hypervisor on AMD64
ii  xen-hypervisor-common 4.11.3+24-g14b62ab3e5-1~deb10u1 all          
Xen Hypervisor - common files
ii  xen-utils-4.11 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         XEN 
administrative tools
ii  xen-utils-common 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xen 
administrative tools - common files
ii  xenstore-utils 4.11.3+24-g14b62ab3e5-1~deb10u1 i386         Xenstore 
command line utilities for Xen
Linux flail 4.19.0-9-686-pae #1 SMP Debian 4.19.118-2+deb10u1 
(2020-06-07) i686 GNU/Linux
 09:15:19 up 29 days, 12:56,  2 users,  load average: 0.23, 0.19, 0.18

(This machine was only recently updated, hence a recent reboot, but 
almost a month seems a lot longer than what is being complained about here)
So, YMMV, but I think you will definitely need to provide more detailed 
information on what happens if you are even slightly interested in 
finding and fixing the cause.
Regards,
Adam