On 23/10/14 09:36, Richard Weinberger wrote: > Anton, > > Am 23.10.2014 um 09:34 schrieb Anton Ivanov: >> Hi Richard, >> >> I have had a question in my mind on this for quite a while around this bug >> (and a quite a few others). > Fell free to ask, I'll try hand to find time to answer. > >> UML by the nature of being UP includes the generic spinlock definition for >> UP which does very little if any. > Correct. IIRC they are a NOP on UML as it does not support preemption. > >> How exactly does this work on a multicore host if you have a different >> thread hitting the same critical section and that thread is running on a >> different core? Isn't that >> effectively a form of weird SMP (which in turn requires stricter locking). >> Am I missing something here? > >From the host side of view the UML kernel a single process and therefore > >there is no parallel execution at all. > > Does this help?
That is what I have always thought as well. Just checking that I am not missing something, thanks. A. > > Thanks, > //richard > > ------------------------------------------------------------------------------ > _______________________________________________ > User-mode-linux-devel mailing list > User-mode-linux-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel ------------------------------------------------------------------------------ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
