Re: Problems with APIC on versions 4.9 and later (4.8 works)

[Claudemir Todo Bom <claudemir@xxxxxxxxxxx>]

Em qui., 28 de jan. de 2021 às 06:49, Jan Beulich <jbeulich@xxxxxxxx> escreveu:
>
> On 28.01.2021 10:47, Jan Beulich wrote:
> > On 26.01.2021 14:03, Claudemir Todo Bom wrote:
> >> If this information is good for more tests, please send the patch and
> >> I will test it!
> >
> > Here you go. For simplifying analysis it may be helpful if you
> > could limit the number of CPUs in use, e.g. by "maxcpus=4" or
> > at least "smt=0". Provided the problem still reproduces with
> > such options, of course.
>
> Speaking of command line options - it doesn't look like you have
> told us what else you have on the Xen command line, and without
> a serial log this isn't visible (e.g. in your video).

All tests are done with xen command line:

dom0_mem=1024M,max:2048M dom0_max_vcpus=4 dom0_vcpus_pin=true
smt=false vga=text-80x50,keep

and kernel command line:

loglevel=0 earlyprintk=xen nomodeset

this way I can get all xen messages on console.

Attached are the frames I captured from a video, I manually selected
them starting from the first readable frame.

As a sidenote, I managed to get the system working with the parameter
"tsc=unstable", performance looks satisfactory but I do not know what
problems I may end with this parameter.

About the CPU: it is an E5-2696v2... it was bought used and is
probably recycled from an OEM server, since this CPU model doesn't
appear on the official Intel website, it looks similar to E5-2697v2,
but is 2.5Ghz instead of 2.7Ghz.

Best regards,
Claudemir

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