This bug has been copied from bug #630129 and has been proposed to be backported to 5.5 z-stream (EUS).
in kernel 2.6.18-194.19.1.el5 linux-2.6-virt-xen-fix-xennet-driver-to-not-corrupt-data.patch
Verify this bug with kernel-xen-2.6.18-194.24.1.el5.ia64. Network connection worked as expected (ping,ssh,wget). dmesg is without any 'Private data too big' message,details as below: [root@localhost ~]# uname -a Linux localhost.localdomain 2.6.18-194.24.1.el5xen #1 SMP Thu Oct 21 04:44:26 EDT 2010 ia64 ia64 ia64 GNU/Linux [root@localhost ~]# dmesg |grep netfront netfront: Initialising virtual ethernet driver. netfront: device eth0 has flipping receive path. So move bug status to VERIFIED.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0839.html
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Recently applied patch introduced a bug, which caused the Xen guest networking not to work properly on 64-bit Itanium processors. However, this bug also revealed an issue, which may have led to a data corruption. With this update, both errors have been fixed, and Xen virtual guest networking now works as expected.