Re: [linux-linus test] 179607: regressions - trouble: fail/pass/starved

[Juergen Gross <jgross@xxxxxxxx>]

On 14.03.23 13:52, osstest service owner wrote:
> flight 179607 linux-linus real [real]
> http://logs.test-lab.xenproject.org/osstest/logs/179607/
>
> Regressions :-(
>
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>   test-amd64-amd64-freebsd12-amd64 13 guest-start          fail REGR. vs. 178042
>   test-amd64-amd64-xl-credit1  19 guest-saverestore.2      fail REGR. vs. 178042
>   test-amd64-amd64-xl-shadow   14 guest-start              fail REGR. vs. 178042
...

In the logs [1] I'm seeing errors like:

Mar 13 23:51:26.275421 [  271.713740] xenbr0: port 2(vif1.0) entered forwarding 
state
Mar 13 23:51:26.287346 (XEN) common/grant_table.c:2982:d0v3 copy beyond page 
area
Mar 13 23:51:48.115383 (XEN) common/grant_table.c:2982:d0v3 copy beyond page 
area
Mar 13 23:51:49.123347 (XEN) common/grant_table.c:2982:d0v3 copy beyond page 
area
Mar 13 23:51:49.459367 (XEN) common/grant_table.c:2982:d0v3 copy beyond page 
area

Given the vif related message directly before those errors the chance is high
this problem is related to netback.

Ross, your patch "xen/netback: Ensure protocol headers don't fall in the
non-linear area" (upstream commit ad7f402ae4f4666) did the most recent changes
in netback affecting GNTTABOP_copy operations. There are probably page boundary
checks (probably on netback side) missing. Could you please have a look?


Juergen

[1]: 
http://logs.test-lab.xenproject.org/osstest/logs/179607/test-amd64-amd64-xl/serial-albana0.log

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