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From: | Paul Brook |
Subject: | Re: [Qemu-devel] How to lock-up your tap-based VM network |
Date: | Mon, 12 Apr 2010 21:07:18 +0100 |
User-agent: | KMail/1.12.4 (Linux/2.6.33-2-amd64; KDE/4.3.4; x86_64; ; ) |
> A major reason for this deadlock could likely be removed by shutting > down the tap (if peered) or dropping packets in user space (in case of > vlan) when a NIC is stopped or otherwise shut down. Currently most (if > not all) NIC models seem to signal both "queue full" and "RX disabled" > via !can_receive(). No. A disabled device should return true from can_recieve, then discard the packets in its receive callback. Failure to do so is a bug in the device. It looks like the virtio-net device may be buggy. Paul.
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