Re: RCU stall and the system boot hang with nfsroot

2016-01-05 Thread Paul E. McKenney
On Tue, Jan 05, 2016 at 03:57:54PM +0800, Aaron Ma wrote: > On Tue, Jan 5, 2016 at 5:18 AM, Paul E. McKenney > wrote: > > On Mon, Jan 04, 2016 at 06:01:37PM +0800, Aaron Ma wrote: > >> On Fri, Jan 1, 2016 at 3:49 AM, Paul E. McKenney > >> wrote: > >> > On Wed, Dec 30, 2015 at 09:41:45AM -0800, Pa

Re: RCU stall and the system boot hang with nfsroot

2016-01-04 Thread Aaron Ma
On Tue, Jan 5, 2016 at 5:18 AM, Paul E. McKenney wrote: > On Mon, Jan 04, 2016 at 06:01:37PM +0800, Aaron Ma wrote: >> On Fri, Jan 1, 2016 at 3:49 AM, Paul E. McKenney >> wrote: >> > On Wed, Dec 30, 2015 at 09:41:45AM -0800, Paul E. McKenney wrote: >> >> On Wed, Dec 30, 2015 at 03:03:33PM +0800,

Re: RCU stall and the system boot hang with nfsroot

2016-01-04 Thread Paul E. McKenney
On Mon, Jan 04, 2016 at 06:01:37PM +0800, Aaron Ma wrote: > On Fri, Jan 1, 2016 at 3:49 AM, Paul E. McKenney > wrote: > > On Wed, Dec 30, 2015 at 09:41:45AM -0800, Paul E. McKenney wrote: > >> On Wed, Dec 30, 2015 at 03:03:33PM +0800, Aaron Ma wrote: > >> > On Wed, Dec 30, 2015 at 7:42 AM, Paul E.

Re: RCU stall and the system boot hang with nfsroot

2016-01-04 Thread Aaron Ma
On Fri, Jan 1, 2016 at 3:49 AM, Paul E. McKenney wrote: > On Wed, Dec 30, 2015 at 09:41:45AM -0800, Paul E. McKenney wrote: >> On Wed, Dec 30, 2015 at 03:03:33PM +0800, Aaron Ma wrote: >> > On Wed, Dec 30, 2015 at 7:42 AM, Paul E. McKenney >> > wrote: > > [ . . . ] > >> > cfg80211: Calling CRDA t

Re: RCU stall and the system boot hang with nfsroot

2015-12-31 Thread Paul E. McKenney
On Wed, Dec 30, 2015 at 09:41:45AM -0800, Paul E. McKenney wrote: > On Wed, Dec 30, 2015 at 03:03:33PM +0800, Aaron Ma wrote: > > On Wed, Dec 30, 2015 at 7:42 AM, Paul E. McKenney > > wrote: [ . . . ] > > cfg80211: Calling CRDA to update world regulatory domain > > cfg80211: Calling CRDA to upda

Re: RCU stall and the system boot hang with nfsroot

2015-12-30 Thread Paul E. McKenney
On Wed, Dec 30, 2015 at 03:03:33PM +0800, Aaron Ma wrote: > On Wed, Dec 30, 2015 at 7:42 AM, Paul E. McKenney > wrote: > > On Tue, Dec 29, 2015 at 05:34:38PM +0800, Aaron Ma wrote: > >> Add paul...@linux.vnet.ibm.com > >> > >> On Tue, Dec 29, 2015 at 5:32 PM, Aaron Ma wrote: > >> > Hi, Paul: > >>

Re: RCU stall and the system boot hang with nfsroot

2015-12-29 Thread Aaron Ma
On Wed, Dec 30, 2015 at 7:42 AM, Paul E. McKenney wrote: > On Tue, Dec 29, 2015 at 05:34:38PM +0800, Aaron Ma wrote: >> Add paul...@linux.vnet.ibm.com >> >> On Tue, Dec 29, 2015 at 5:32 PM, Aaron Ma wrote: >> > Hi, Paul: >> > I found the linux-stable-4.1.15 with rt15 patches boot hang sometimes.

Re: RCU stall and the system boot hang with nfsroot

2015-12-29 Thread Paul E. McKenney
On Tue, Dec 29, 2015 at 05:34:38PM +0800, Aaron Ma wrote: > Add paul...@linux.vnet.ibm.com > > On Tue, Dec 29, 2015 at 5:32 PM, Aaron Ma wrote: > > Hi, Paul: > > I found the linux-stable-4.1.15 with rt15 patches boot hang sometimes. > > Hardware is Grantley-EP and WildcatPass. I must confess tha

Re: RCU stall and the system boot hang with nfsroot

2015-12-29 Thread Aaron Ma
Add paul...@linux.vnet.ibm.com On Tue, Dec 29, 2015 at 5:32 PM, Aaron Ma wrote: > Hi, Paul: > I found the linux-stable-4.1.15 with rt15 patches boot hang sometimes. > Hardware is Grantley-EP and WildcatPass. > No response by sysrq. > > Did you found any issue about this? Or how can I address this

Re: RCU stall and the system boot hang

2015-12-01 Thread Paul E. McKenney
On Mon, Nov 30, 2015 at 09:19:18AM -0800, Paul E. McKenney wrote: > On Mon, Nov 30, 2015 at 02:54:13PM +0800, fupan li wrote: [ . . . ] > > No, just a normal boot, and these stalls were happened before > > systemd services running. > > Interesting. My testing show v4.1 being OK, with the first

Re: RCU stall and the system boot hang

2015-11-30 Thread Paul E. McKenney
On Mon, Nov 30, 2015 at 02:54:13PM +0800, fupan li wrote: > 2015-11-29 14:05 GMT+08:00 Paul E. McKenney : > > > On Sun, Nov 29, 2015 at 12:46:10PM +0800, fupan li wrote: > > > 2015-11-28 22:53 GMT+08:00 Paul E. McKenney > >: > > > > > > > On Sat, Nov 28, 2015 at 01:05:52PM +0800, fupan li wrote:

Re: RCU stall and the system boot hang

2015-11-28 Thread Paul E. McKenney
On Sun, Nov 29, 2015 at 12:46:10PM +0800, fupan li wrote: > 2015-11-28 22:53 GMT+08:00 Paul E. McKenney : > > > On Sat, Nov 28, 2015 at 01:05:52PM +0800, fupan li wrote: > > > 2015-11-28 0:28 GMT+08:00 Paul E. McKenney : > > > > > > > On Fri, Nov 27, 2015 at 08:23:24PM +0800, fupan li wrote: > > >

Re: RCU stall and the system boot hang

2015-11-28 Thread Paul E. McKenney
On Sat, Nov 28, 2015 at 01:05:52PM +0800, fupan li wrote: > 2015-11-28 0:28 GMT+08:00 Paul E. McKenney : > > > On Fri, Nov 27, 2015 at 08:23:24PM +0800, fupan li wrote: > > > Hi, Paul > > > > > > On my Wildcat_Pass (Haswell) board, the system boot will hang as below. > > > The kernel is preempt-rt

Re: RCU stall and the system boot hang

2015-11-27 Thread Paul E. McKenney
On Fri, Nov 27, 2015 at 08:23:24PM +0800, fupan li wrote: > Hi, Paul > > On my Wildcat_Pass (Haswell) board, the system boot will hang as below. > The kernel is preempt-rt kernel. > But it was not reproduced every time, about 1 time per 5-10 boots. CCing LMKL and linux-rt-users in case anyone els