Hello, Jun,
Do you see the same hang without the patch?
Thanx, Paul
On Wed, Mar 27, 2019 at 01:50:57AM +0000, Zhang, Jun wrote:
Helloļ¼Paul
I use a new NUC (made in 2017) to test, meet the same hang. System run very slowly.
But I use my PC (made before 2015), test V3.18.136+ patch for 12 hours, still well.
Maybe V3.18.y don't support some new devices.
-----Original Message----- From: Paul E. McKenney [mailto:paulmck@linux.ibm.com] Sent: Tuesday, March 26, 2019 23:56 To: He, Bo bo.he@intel.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org; stable@vger.kernel.org; Zhang, Jun jun.zhang@intel.com; Xiao, Jin jin.xiao@intel.com; Bai, Jie A jie.a.bai@intel.com Subject: Re: [PATCH 3.18 132/134] rcu: Do RCU GP kthread self-wakeup from softirq and interrupt
On Tue, Mar 26, 2019 at 08:43:45AM +0000, He, Bo wrote:
Hi, Paul: I have tried on my PC and not hit any hang issue with RCU torture test for one hour, the configurations are like: OS: ubuntu 16.04 kenrel: 3.18.136 + 3.18 rcu patch CPU: Intel(R) Xeon(R) CPU E3-1225 V2 @ 3.20GHz
Sounds good, please proceed!
Thanx, Paul-----Original Message----- From: Paul E. McKenney paulmck@linux.ibm.com Sent: Tuesday, March 26, 2019 12:00 AM To: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: He, Bo bo.he@intel.com; linux-kernel@vger.kernel.org; stable@vger.kernel.org; Zhang, Jun jun.zhang@intel.com; Xiao, Jin jin.xiao@intel.com; Bai, Jie A jie.a.bai@intel.com Subject: Re: [PATCH 3.18 132/134] rcu: Do RCU GP kthread self-wakeup from softirq and interrupt
On Sat, Mar 23, 2019 at 07:33:15AM +0100, Greg Kroah-Hartman wrote:
On Fri, Mar 22, 2019 at 04:00:17PM +0000, He, Bo wrote:
Hi, Greg: Can you hold on the 3.18-stable branch, it seems there are some issue, please see the comments from Paul:
Comments from Paul: I subjected all of the others to light rcutorture testing, which they passed. This v3.18 patch hung, however. Trying it again with stock v3.18 got the same hang, so I believe we can exonerate the patch and give it a good firm "maybe" on 3.18.
Worth paying special attention to further test results from 3.18.x, though!
Ok, I've dropped this from the 3.18.y queue now, thanks.
Bo, if you know of a "y" for 3.18.y that would likely pass rcutorture testing, please let me know.
Thanx, Paul