Hi,<br><br>We have recently update kernel-xen on all of our hosts (3) and its vms all running fc6. kernel-xen 2.6.20-1.2962.fc6xen is doing good on two hosts and all its vms (10), however its giving lot of problem on third host.
<br><br>when i reboots the host into latest kernel-xen the domUs become unaccessible in a while hardly run for 10 minutes, &#39;xm list&#39; still shows there status but i can&#39;t access it from outside.<br><br>We are using loop back files for domUs File system, for testing i rebooted host into last working kernel 
2.6.20-1.2952.fc6xen and domUs into latest kernel-xen and its doing pretty good, which mean latest kernel-xen is only giving problem at host side.<br><br>when running 2.6.20-1.2962 on host it giving this in /var/log/messages
<br><br>Jul 12 10:42:45 xxxx kernel: xen_net: Memory squeeze in netback driver.<br>Jul 12 10:42:50 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:42:50 xxxx kernel: xen_net: Memory squeeze in netback driver.<br>
Jul 12 10:42:55 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:42:55 xxxx kernel: xen_net: Memory squeeze in netback driver.<br>Jul 12 10:43:00 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:00 xxxx kernel: xen_net: Memory squeeze in netback driver.
<br>Jul 12 10:43:05 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:05 xxxx kernel: xen_net: Memory squeeze in netback driver.<br>Jul 12 10:43:10 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:10 xxxx kernel: xen_net: Memory squeeze in netback driver.
<br>Jul 12 10:43:15 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:15 xxxx kernel: xen_net: Memory squeeze in netback driver.<br>Jul 12 10:43:20 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:20 xxxx kernel: xen_net: Memory squeeze in netback driver.
<br>Jul 12 10:43:25 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:25 xxxx kernel: xen_net: Memory squeeze in netback driver.<br>Jul 12 10:43:30 xxxx kernel: printk: 4 messages suppressed.<br>Jul 12 10:43:30 xxxx kernel: xen_net: Memory squeeze in netback driver.
<br>Jul 12 10:43:35 xxxx kernel: printk: 4 messages suppressed.<br><br>Thanks. Askar<br>