On 11/26, Peter Zijlstra wrote: > > On Tue, Nov 26, 2013 at 11:00:50AM -0800, Linus Torvalds wrote: > > > IOW, where do we really care about the "unlock+lock" is a memory > > barrier? And could we make those places explicit, and then do > > something similar to the above to them? > > So I don't know :-( > > I do know myself and Oleg have often talked about it, and I'm fairly > sure we must have used it at some point. No... I can't recall any particular place which explicitely relies on "unlock+lock => mb(). (although I know the out-of-tree example which can be ignored ;) I can only recall that this was mentioned in the context like "no, the lack of mb() can't explain the problem because we have unlock+lock". Oleg. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>