Messages in this thread | | | Date | Fri, 19 Jul 2013 20:32:12 -0400 | From | Dave Jones <> | Subject | Re: mlockall triggred rcu_preempt stall. |
| |
On Fri, Jul 19, 2013 at 03:15:39PM -0700, Paul E. McKenney wrote: > On Fri, Jul 19, 2013 at 10:53:23AM -0400, Dave Jones wrote: > > My fuzz tester keeps hitting this. Every instance shows the non-irq stack > > came in from mlockall. I'm only seeing this on one box, but that has more > > ram (8gb) than my other machines, which might explain it. > > Are you building CONFIG_PREEMPT=n? I don't see any preemption points in > do_mlockall(), so a range containing enough vmas might well stall the > CPU in that case.
That was with full preempt.
> Does the patch below help? If so, we probably need others, but let's > first see if this one helps. ;-)
I'll try it on Monday.
Dave
| |