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, and a CPU is sticking(busy acquiring the spinlock) at the same duration. Can I think in this way? Thank you for your attention to this matter. Best Regards. Valdis Klētnieks <valdis.kletnieks@xxxxxx> 于2020年7月4日周六 下午4:09写道： 孙世龙 sunshilong <sunshilong369@xxxxxxxxx> 于2020年7月4日周六 下午5:04写道： > > 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 <valdis.kletnieks@xxxxxx> 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 Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
