Re: deadlock in scheduler enabling HRTICK feature

From: David Ahern
Date: Fri Jun 28 2013 - 13:29:02 EST


On 6/28/13 3:09 AM, Peter Zijlstra wrote:

Yah! :-) Obviously doing a wakeup while holding scheduler locks isn't going to
work out well. And the only reason we really need that pesky softirq nonsense
is when we accidentally schedule a timer that's already expired; in that case
we'll run it from sirq context.

We don't care about missing events like that; there's always the actual tick
for backup.

I suppose I'd better go write a Changelog and properly submit the patch :-)


Thanks for the quick turnaround on the patch - and the explanation.

David
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