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kvm: Fix memory slot generation updates

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Previous patch "kvm: Minor memory slot optimization" (b7f69c555c)
overlooked the generation field of the memory slots.  Re-using the
original memory slots left us with with two slightly different memory
slots with the same generation.  To fix this, make update_memslots()
take a new parameter to specify the last generation.  This also makes
generation management more explicit to avoid such problems in the future.

Reported-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Alex Williamson 2012-12-21 08:20:16 -07:00 • committed by Gleb Natapov
parent 871a069db9
commit 116c14c019
2 changed files with 7 additions and 5 deletions
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3
include/linux/kvm_host.h
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@ -428,7 +428,8 @@ void kvm_exit(void);
void kvm_get_kvm(struct kvm *kvm);
void kvm_put_kvm(struct kvm *kvm);
void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
u64 last_generation);
static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
{