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xen-devel
Re: [Xen-devel] pvops-dom0 console freezes after latest ballooning patch
On 12/09/09 11:22, Ronny.Hegewald@xxxxxxxxx wrote:
Setup: xen 3.4.1, 32-bit linux dom0 2.6.31.6 from pvops-git tree from
2009-12-03
Since the latest ballooning patch "Add hugepage support to balloon
driver
<http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=commit;h=0e898d5e9b893324435e0e77b67fe8d2f0523dbe>"
i experience dom0 console freezes. Additional to that there is a
stacktrace about a kernel-bug in drivers/xen/balloon.c in line 346,
invalide opcode 0000 (i can send the full stacktrace if someone is
interested).
Yes, please. Presumably its from the BUG_ON testing the hypercall
return status?
The cause for that seems to be that in the
decrease_reservation-funtion the PageHighMem - check is not executed
on the assocciated page for the current pfn. Its always the last page
that got allocated in the for-loop before, when all the pages are
allocated.
With the attached patch that crashes dont occur anymore. But im not a
kernel-developer so im not sure that this is the correct fix.
It looks reasonable to me. Dave?
J
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