From: David Woodhouse <[email protected]> Don't allow the events to accumulate in the eventfd counter, drain them as they are handled.
Signed-off-by: David Woodhouse <[email protected]> --- virt/kvm/eventfd.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index d6408bb497dc..98b5cfa1d69f 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -193,6 +193,9 @@ irqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void *key) int idx; if (flags & EPOLLIN) { + u64 cnt; + eventfd_ctx_do_read(&irqfd->eventfd, &cnt); + idx = srcu_read_lock(&kvm->irq_srcu); do { seq = read_seqcount_begin(&irqfd->irq_entry_sc); -- 2.26.2
