Hi, i am constantly facing a problem with a domU running out of SKBUFF. I see the message "Attempt to allocate order 5 skbuff. Increase MAX_SKBUFF_ORDER." in domU 400-500 times/minute The domU contains a PCI Network Card (tg3), three netloop devices (the domU acts as perimeter Firewall) and some tun devices. I have tried playing around with net.core Parameter but did not find a way to avoid this ... any hints ? The domU is receiving about 570 packets/sec and forwarding about 26 packets/sec (peak is at 2000 packets/sec) however the problem occures constantly. dom0 is running 2.6.19-4-generic-amd64 (2.6.19-2ubuntu7.1) domU is running 2.6.18-4-xen-vserver-amd64 (2.6.18.dfsg.1-12etch2) xen-utils/xen-tools 3.0.3 from ubuntu .. what sideeffects might cause an increase of MAX_SKBUFF_ORDER in the code (im pretty short on memory in domU, 512MB currently). Any other ways to workaround this ? It seams when running out of buffers, i currently loose tcp connections ... e.g. postfix complains about lost connections .. regards Georg Glas _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users