Re: RCU stalls on 32-bit pmac SMP

2012-06-19 Thread Paul E. McKenney
On Mon, Jun 18, 2012 at 02:58:57PM -0700, Paul E. McKenney wrote: > On Tue, Jun 19, 2012 at 06:45:31AM +1000, Benjamin Herrenschmidt wrote: > > Hi Paul ! > > > > On Mon, 2012-06-18 at 10:05 -0700, Paul E. McKenney wrote: > > > > > > sd 0:0:0:0: Attached scsi generic sg0 type 0 > > > > sda: [mac]

Re: RCU stalls on 32-bit pmac SMP

2012-06-18 Thread Paul E. McKenney
On Tue, Jun 19, 2012 at 06:45:31AM +1000, Benjamin Herrenschmidt wrote: > Hi Paul ! > > On Mon, 2012-06-18 at 10:05 -0700, Paul E. McKenney wrote: > > > > sd 0:0:0:0: Attached scsi generic sg0 type 0 > > > sda: [mac] sda1 sda2 sda3 sda4 sda5 sda6 sda7 sda8 sda9 sda10 sda11 > > > sda12 sda13 sda

Re: RCU stalls on 32-bit pmac SMP

2012-06-18 Thread Benjamin Herrenschmidt
Hi Paul ! On Mon, 2012-06-18 at 10:05 -0700, Paul E. McKenney wrote: > > sd 0:0:0:0: Attached scsi generic sg0 type 0 > > sda: [mac] sda1 sda2 sda3 sda4 sda5 sda6 sda7 sda8 sda9 sda10 sda11 sda12 > > sda13 sda14 sda15 > > sd 0:0:0:0: [sda] Attached SCSI disk > > scsi 0:0:1:0: Direct-Access

Re: RCU stalls on 32-bit pmac SMP

2012-06-18 Thread Paul E. McKenney
On Mon, Jun 18, 2012 at 10:35:46AM +1000, Benjamin Herrenschmidt wrote: > Hi Paul ! > > I was about to go debug something else when I hit that with -rc3 (plus > the patch to fix the current bug.h breakage) on a 32-bit PowerMac G4 SMP > (2 CPUs): About 1mn pause at boot followed by a bunch of RCU s