[Xen-devel] Re: kernel BUG at arch/x86/xen/mmu.c:1872

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

If it is possible, please try not to top-post as this make reading
more confusing for me at least.  Thanks ;)


2011/4/12 MaoXiaoyun <tinnycloud@xxxxxxxxxxx>:
> Hi:
>
>        I have just kicked off cpuidle=0 "cpufreq=none" tests.

Let see whether are you able to reproduce the tlb BUG with the above.

>
>        What is your Xen version?  Do you use the backend driver of
> 2.6.32.36?

You are asking me?
xen-4.0.2-rc3-pre latest changeset and also xen-4.1.1-rc1-pre.
What do you mean backend driver?  My testing are mostly on PV domU and
HVM on windows with LVM as storage.  I do not use VDH or any PV
drivers for windows.

>
>        Beside the "TLB BUG ", I've met at least two other issues
>        1)Xen4.0.1 + 2.6.32.36 kernel + backend driver from 2.6.31  ==> will
> cause "Bad grant reference " log in serial output
>        2)Xen4.0.1 + 2.6.32.36 kernel with its owen backend driver   ==> will
> cause disk error like belows.
>
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> sd 0:0:0:0: rejecting I/O to offline device
> end_request: I/O error, dev tdb, sector 28699593
> end_request: I/O error, dev tdb, sector 28699673
> end_request: I/O error, dev tdb, sector 28699753
> end_request: I/O error, dev tdb, sector 28699833
> end_request: I/O error, dev tdb, sector 28699913
> end_request: I/O error, dev tdb, sector 28699993
> end_request: I/O error, dev tdb, sector 28700073

Is this related to VDH?  What is the specific backend driver?  These
started to surface after you applied my backport patch or regardless
the patch applied it is already there?

Thanks.

Kindest regards,
Giam Teck Choon

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