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    SubjectRe: [Xen-devel] [PATCH 0/3] [v4] kexec and kdump for Xen PVonHVM guests
    On Thu, Aug 04, 2011 at 06:20:53PM +0200, Olaf Hering wrote:
    >
    >
    > The following series implements kexec and kdump in a Xen PVonHVM guest.
    >
    > It is (should be) available via git:
    >
    > git://github.com/olafhering/linux.git xen-kexec-3.0
    >
    > The kexec or kdump kernel has to take care of already allocated virqs,
    > PV devices in Closed or Connected state, and of registered watches in
    > the old kernel. With the three patches these conditions are checked
    > during boot of the new kernel rather than in the reboot/crash path.
    >
    > A fixed kexec-tools-2.0.2 package is required:
    > http://lists.infradead.org/pipermail/kexec/2011-May/005026.html
    > http://lists.infradead.org/pipermail/kexec/2011-August/005339.html
    >
    > Another fix is for xenstored, it has to accept the XS_INTRODUCE from a guest:
    > http://lists.xensource.com/archives/html/xen-devel/2011-08/msg00007.html
    >
    > One open issue is the balloon driver. It removes pages from the guest
    > and gives them back to the hypervisor. The kexec kernel is not aware of
    > the fact that some pages are unavailable, and hangs or crashes.
    > The workaround for the time being is:
    >
    > if test -f /sys/devices/system/xen_memory/xen_memory0/target -a \
    > -f /sys/devices/system/xen_memory/xen_memory0/target_kb
    > then
    > cat /sys/devices/system/xen_memory/xen_memory0/target > \
    > /sys/devices/system/xen_memory/xen_memory0/target_kb
    > fi
    > kexec -e
    >
    > This has to be resolved with another series of changes.

    You are just plowing through these bugs and fixing. Thanks for doing it!

    I think one more revision and they will be ready?


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