From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jay Rolette Subject: kernel: BUG: soft lockup - CPU#1 stuck for 22s! [kni_single:1782] Date: Tue, 10 Feb 2015 19:33:14 -0600 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: Dev Return-path: List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" Environment: * DPDK 1.6.0r2 * Ubuntu 14.04 LTS * kernel: 3.13.0-38-generic When we start exercising KNI a fair bit (transferring files across it, both sending and receiving), I'm starting to see a fair bit of these kernel lockups: kernel: BUG: soft lockup - CPU#1 stuck for 22s! [kni_single:1782] Frequently I can't do much other than get a screenshot of the error message coming across the console session once we get into this state, so debugging what is happening is "interesting"... I've seen this on multiple hardware platforms (so not box specific) as well as virtual machines. Are there any known issues with KNI that would cause kernel lockups in DPDK 1.6? Really hoping someone that knows KNI well can point me in the right direction. KNI in the 1.8 tree is significantly different, so it didn't look straight-forward to back-port it, although I do see a few changes that might be relevant. Any suggestions, pointers or other general help for tracking this down? Thanks! Jay