Hello, On Sun, Jul 22, 2012 at 04:46:54PM -0400, Andy Walls wrote: > Hmmm, I didn't know about the constraint about 'known to be alive' in > the other email I just sent. > > That might make calling flush_kthread_work() hard for a user to use, if > the user lets the work get freed by another thread executing the work.
Umm... flushing a freed work item doesn't make any sense at all. The pointer itself loses the ability to identify anything. What if it gets recycled to another work item which happens to depend on the flusher to make forward progress? You now have a circular dependency through a recycled memory area. Good luck hunting that down. For pretty much any API, allowing dangling pointers as argument is insane. If you want to flush self-freeing work items, flush the kthread_worker. That's how it is with workqueue and how it should be with kthread_worker too. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
