Messages in this thread | | | Date | Tue, 19 Dec 2000 02:32:40 +0100 | From | Jamie Lokier <> | Subject | Re: 2.4.0-test13-pre1 lockup: run_task_queue or tty_io are wrong |
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Linus Torvalds wrote: > > I wasn't clear. The sentinel is a local structure on the stack, and > > only exists while run_task_queue is executing. Another name for this is > > "deletion-safe pointer". > > Yes, except run_task_queue removes every object it finds. So two > concurrent run_task_queues would be bad.
That could work, but forget it. I've just looked at Andrew's patch and it's much nicer :-)
If you put a spinlock around the list operations in Andrew's version, you'd have safe tqueue deletions again (if you felt that was worth having). Some tricks and you can make it a different spinlock, but I doubt that would be a net benefit.
-- Jamie - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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