Andrea Arcangeli wrote:
This patch to kvm-userland.git allows to build the tree on older
kernels without mmu notifiers.
Unfortunately emulating mmu notifiers with kprobes was feasible only
for do_wp_page because it has a special property where calling the
spte invalidate before the pte invalidate is ok thanks to the
guarantee of that pte being wprotect, not to tell about the start/end
functions. So old kernels without mmu notifiers will have to keep the
page pinned I'm afraid. So to remove the page pin in future patches in
a backwards compatible way, we'll have to go with #ifdef MMU_NOTIFIER
in kvm.git code I'm afraid and this should be all that's needed on the
kvm-userland side. Adding all page pinning needed by old kernels
through hack-module.awk sounds a bit extreme to me, even if it would
result in cleaner kvm.git code... anyway I think the below patch will
be still needed to build regardless how we decide to handle the future
changes.
Applied; thanks. I think page pinning can be worked around by pinning
all pages on memslot registration (and unpinning on memslot removal);
this will slow down virtual machine startup, but is at least simple.
--
error compiling committee.c: too many arguments to function
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