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Re: Debian 10, xen 4.11 reliability



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




 


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