On 09/20/2010 03:44 PM, Michael S. Tsirkin wrote: >>> From f77c3143f3fbefdfa2f0cc873c2665b5aa78e8c9 Mon Sep 17 00:00:00 2001 >>> From: Anthony Liguori<aligu...@us.ibm.com> >>> Date: Mon, 20 Sep 2010 15:29:31 -0500 >>> Subject: [PATCH] tap: make sure packets are at least 40 bytes long >>> >>> This is required by ethernet drivers but not enforced in the Linux tap code >>> so >>> we need to fix it up ourselves. >>> >> >> This enforces ethernet semantics on the internal links (which is probably >> not good), >> > Plus plus ungood. > When we do add e.g. ipoib support, we'll have to go and hunt these bugs down > again. > Also will make it impossible to implement any devices that pass in guest > buffers > without FCS and padding. >
That's actually a good point which strongly is in favor of making the devices do the padding themselves. Regards, Anthony Liguori -- emulated netcards don't work with recent sunos kernel https://bugs.launchpad.net/bugs/638955 You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. Status in QEMU: New Bug description: hi there, i'm using qemu-kvm backend in version: # qemu-kvm -version QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008 Fabrice Bellard and there are just *not working any of model=$type with combinations of recent sunos (solaris, openindiana, opensolaris, ..) .. you can download for testing purposes iso from here: http://dlc-origin.openindiana.org/isos/147/ or from here: http://genunix.org/distributions/indiana/ << osol and oi are also bubuntu-like *live cds, so no need to bother with installing behaviour is as follows: e1000 - receiving doesn't work, transmitting works .. dladm (tool for handle ethers) shows that is all ok, correct mode is loaded up, it just seems like this driver works at 100% but .. rtl8169|pcnet - works in 10Mbit mode with several other issues like high cpu utilization and so .. dladm is unable to recognize options for this kind of -nic others - just don't work .. i experienced this issue several times in past .. woraround was, that rtl8169 worked so-so .. with recent sunos kernel it doesn't. it's easy to reproduce, this is why i'm not putting here more then launching script for my virtual machine: # cat openindiana.sh qemu-kvm -hda /home/kvm/openindiana/openindiana.img -m 2048 -localtime -cdrom /home/kvm/+images/oi-dev-147-x86.iso -boot d \ -vga std -vnc :9 -k en-us -monitor unix:/home/kvm/openindiana/instance,server,nowait \ -net nic,model=e1000,vlan=1 -net tap,ifname=oi0,script=no,vlan=1 & sleep 2; ip l set oi0 up; ip a a 192.168.99.9/24 dev oi0; regards by daniel
