Hello Michael, On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote: > Possibly GFP_ATOMIC allocations in vring_add_indirect are failing? > Is there a chance you are tight on guest memory for some reason? > with vhost, virtio does currently consume a bit more memory than > with userspace backend. I did see memory leak on host every time after exiting guest. I don't know where. Do you see it? Anyway after I reboot host and restart guest with large memory allocation, I do see performance improves to 3xxxMb/s, and occasionally reaches 40xxMb/s. But "queue full" still exists, I can avoid the problem by increasing send queue size from qemu. I will apply deferring skb allocation patch on guest to see any performance gain after your vhost patch. Thanks Shirley -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
