On Tue, Feb 28, 2012 at 1:48 AM, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote: >> BUG: soft lockup - CPU#3 stuck for 22s! [kworker/3:1:78] > > So you're stuck in softirq for 22s+, max_restart is 10, this gives that > on average you spend 2.2s+ per softirq invocation, this is completely > absolutely bonkers. Softirq handlers should never consume significant > amount of cpu-time. I'm not sure whether this was just one __do_softirq() invocation, or multiple. I'll see if I can instrument this, but the suspicion is that max_restart can't help when softirq is constantly re-triggered. I'll also add the below patch to see if any single invocation is violating these expectations. -- Dan -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
