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virtio-balloon: process all in sgs for free_page_vq 

We only process the first in sg which may lead to the bitmap of the
pages belongs to following sgs were not cleared. This may result more
pages to be migrated. Fixing this by process all in sgs for
free_page_vq.

Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20211129030841.3611-1-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2021-11-29 11:08:40 +08:00 committed by Michael S. Tsirkin
parent 846a1e85da
commit 0fe7245d8b
1 changed files with 5 additions and 2 deletions
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7
hw/virtio/virtio-balloon.c
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@ -510,6 +510,7 @@ static bool get_free_page_hints(VirtIOBalloon *dev)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtQueue *vq = dev->free_page_vq;
bool ret = true;
int i;
while (dev->block_iothread) {
qemu_cond_wait(&dev->free_page_cond, &dev->free_page_lock);
@ -544,8 +545,10 @@ static bool get_free_page_hints(VirtIOBalloon *dev)
}
if (elem->in_num && dev->free_page_hint_status == FREE_PAGE_HINT_S_START) {
qemu_guest_free_page_hint(elem->in_sg[0].iov_base,
elem->in_sg[0].iov_len);
for (i = 0; i < elem->in_num; i++) {
qemu_guest_free_page_hint(elem->in_sg[i].iov_base,
elem->in_sg[i].iov_len);
}
}
out: