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[Qemu-devel] virtio-net crashes vs. old napi patch
From: |
Peter Lieven |
Subject: |
[Qemu-devel] virtio-net crashes vs. old napi patch |
Date: |
Tue, 8 Feb 2011 08:41:57 +0100 |
Hi,
as reported several times guests with virtio-net crash under heavy network load.
There have been several patches submitted to the upstream kernel e.g:
virtio_net: do not reschedule rx refill forever
virtio_net: fix oom handling on tx
udp/tcp/..: use limited socket backlog
but that did not finally solved the problem. Is is at
least possible to crash a recent 2.6.38 kernel very
easily.
There is currently a discussion going on on launchpad:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/579276
I found out earlier that an old patch by Suse developers
seems to fix the problem for good:
http://kerneltrap.org/mailarchive/linux-netdev/2010/6/4/6278660
and recently tests seem to confirm this.
Does anyone know why this patch did not went upstream or was it
overseen?
Peter
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