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Date: Thu, 27 Jun 2013 03:37:14 +0200 From: Andi Kleen <andi@...stfloor.org> To: Waiman Long <waiman.long@...com> Cc: Andi Kleen <andi@...stfloor.org>, Alexander Viro <viro@...iv.linux.org.uk>, Jeff Layton <jlayton@...hat.com>, Miklos Szeredi <mszeredi@...e.cz>, Ingo Molnar <mingo@...hat.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, Linus Torvalds <torvalds@...ux-foundation.org>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, "Chandramouleeswaran, Aswin" <aswin@...com>, "Norton, Scott J" <scott.norton@...com>, Thomas Gleixner <tglx@...utronix.de>, Peter Zijlstra <peterz@...radead.org>, Steven Rostedt <rostedt@...dmis.org> Subject: Re: [PATCH v2 1/2] spinlock: New spinlock_refcount.h for lockless update of refcount > It will be hard to know what changes will be needed without knowing > the exact semantics of the spinlock functions with lock elision. Can > you explain a little more what bizarre semantics you are referring > to? Totally independent of elision. For example, what semantics does spin_unlock_wait() have with a ticket lock. Where in the queue does it wait? It doesn't really make sense with a ticket lock. What semantics would lockdep put on it? -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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