Messages in this thread | | | Date | Fri, 17 Jan 2014 10:08:56 +0100 | From | Peter Zijlstra <> | Subject | Re: [RFC][PATCH] preempt: Debug for possible missed preemption checks |
| |
On Thu, Jan 16, 2014 at 09:12:14PM -0800, Andrew Morton wrote: > On Thu, 16 Jan 2014 23:57:51 -0500 Steven Rostedt <rostedt@goodmis.org> wrote: > > > When PROVE_LOCKING and PREEMPT is configured, the preempt state > > tracking is active. Testing this out, I added a module that did the > > following: > > So I assume your kernel at least has no instances of this bug, so we > don't need the patch ;) It *is* a fairly daft thing to do.
Yeah, its exceedingly daft, but I do run into it every so often. Say once a year or so.
Also, its usually not really a problem on 'normal' kernels, but it absolutely blows on -rt.
| |