diff options
| author | David Woodhouse <dwmw@amazon.co.uk> | 2020-10-27 13:55:23 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-11-15 09:49:11 -0500 |
| commit | b59e00dd8cda75fc8303c9f6847ac720b10664e3 (patch) | |
| tree | 50e3d41ce27544337acfe76e03568b8f1d2a0561 /virt | |
| parent | b1b397aeef8177f4f7bd91a0d5fa708f4752a499 (diff) | |
| download | lwn-b59e00dd8cda75fc8303c9f6847ac720b10664e3.tar.gz lwn-b59e00dd8cda75fc8303c9f6847ac720b10664e3.zip | |
kvm/eventfd: Drain events from eventfd in irqfd_wakeup()
Don't allow the events to accumulate in the eventfd counter, drain them
as they are handled.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20201027135523.646811-4-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/eventfd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index efa8a5ae7a95..e996989cd580 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -194,6 +194,9 @@ irqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void *key) int ret = 0; 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); |