yogeshwar sonawane wrote: > Hi all, > > I am getting this error while kernel hangs. I am using CentOS 4.4 > (x86_64) on Dual Opteron 4 way SMP machine. After searching, i didn't > found a sound answer. If anybody know the solution, plz let me know. > > Thanks in advance, > Yogeshwar I've seen the same panic error message on our 16-core Opteron server (x86_64) - please see https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=200885 The workaround was to specify nmi_watchdog=0 on the kernel command line. In the latest kernel in the "testing" repository (and also on J. Baron's webpage) I see that they modified the timeout of the nmi_watchdog, from 5 to 30 seconds. Plus there are many other fixes in that kernel - I'd try it. HTH, Kay