Re: Merging KVM live migration upstream

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Jan Kiszka wrote:
Avi or Uri,

could you explain the first and third hunk? Why are they needed in
qemu-kvm, and will we also need something comparable upstream? They do
not look very beautiful.


These date from the bad old days where we relied on phys_ram_base. I think this is obsolete.

Since we reserve these memory addresses, it won't do any harm, but we can certainly remove them.

The second hunk, I guess, should become a kvm hook to
cpu_physical_memory_get_dirty - or is this too costly for other users of
this inline function?

Note the dependency on current_addr: this is meant to happen every time we cycle through all memory, so it doesn't fit in cpu_physical_memory_get_dirty().

And does anyone knows further migration-related hunks that are missing
upstream (except for the KVM hook in
cpu_physical_memory_set_dirty_tracking)?


We need to make sure vga plays well with this, like we discussed.


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