> From: Brad Campbell > Sent: Tuesday, March 31, 2015 2:28 AM > > > If someone could give me some hard tests to do along the lines of what > Saso is up to I could probably get that done faster. With the right > bad kernel I can reproduce this lockup in a matter of hours. Hi, My machine usually (but not always) locks during backup. At around 3AM, a samba machine (a kvm machine on the same server actually) cifs mounts C$ and starts copying files off of it. The last stacktrace also shows network code. Is your machine actively working over network (sharing files)? Regards, Saso Slavicic -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html