Jan Kiszka wrote:
This nice little buglet complicates a smarter slot management in qemu user space just "slightly". Sigh... --------> When checking for overlapping slots on registration of a new one, kvm currently also considers zero-length (ie. deleted) slots and rejects requests incorrectly. This finally denies user space from joining slots. Fix the check by skipping deleted slots.
Can userspace fail gracefully when the bug is present? If not, the you should add a KVM_CAP_ to advertise the fix; without the capability don't attempt the smarter slot management.
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