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

[Juergen Gross <jgross@xxxxxxxx>]

On 14.03.23 14:27, Juergen Gross wrote:
> 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?
Okay, I've had a try (see attached patch).

Anthony, as I can't reproduce the original problem, would it be possible to
start an OSStest run of the linux-linus test with my patch applied to the
used kernel?


Juergen

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