Messages in this thread | | | Subject | Re: [PATCH v2 18/19] ARC: [plat-eznps] replace sync with proper cpu barrier | From | Vineet Gupta <> | Date | Tue, 17 Nov 2015 18:07:08 +0530 |
| |
On Tuesday 17 November 2015 05:52 PM, Peter Zijlstra wrote: >> > BTW since we are on the topic we have this loop in stack unwinder which can >> > potentially cause RCU stalls, actual lockups etc. I was planning to add the >> > following - does that seem fine to you. > Worries me more than anything. How could you get stuck in there?
No we not getting stuck in there - but this has potential to - if say unwind info were corrupt (not seen that ever though).
The old code won't even respond to say a Ctrl+C if it were stuck ! Plus the reschedule there will keeps sched happy when say unraveling deep stack frames with perf ?
| |