Hi, Valdis Klētnieks Thank you for taking the time to respond to me. I have a better understanding of this matter.
>> Can I draw the conclusion that continually acquiring the spinlock causes the >> soft >> lockup and the CPU has been stuck for 22s? >> Can I think in this way? >No. It's been stuck for 22s *TRYING* and *FAILING* to get the spinlock. I see. So there is a thread that has held the corresponding spinlock for more 22s. Can I think in this way? Thank you for your attention to this matter. Best Regards. Valdis Klētnieks <[email protected]> 于2020年7月4日周六 下午4:09写道： > > > > Can I draw the conclusion that continually acquiring the spinlock causes > > the soft > > lockup and the CPU has been stuck for 22s? > > Can I think in this way? > > No. It's been stuck for 22s *TRYING* and *FAILING* to get the spinlock. > > For comparison - spinlocks are usually used when you need a lock, but the > code protected by the lock is short (things like adding to a linked list, > etc), > so it should again become available in milliseconds - things where it would > take > longer to put this thread to sleep and wake another one up than we expect > to be waiting for this lock. _______________________________________________ Kernelnewbies mailing list [email protected] https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
