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Date: Fri, 30 Aug 2013 13:43:11 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Waiman Long <waiman.long@...com> Cc: Ingo Molnar <mingo@...nel.org>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Alexander Viro <viro@...iv.linux.org.uk>, Jeff Layton <jlayton@...hat.com>, Miklos Szeredi <mszeredi@...e.cz>, Ingo Molnar <mingo@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, linux-fsdevel <linux-fsdevel@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Peter Zijlstra <peterz@...radead.org>, Steven Rostedt <rostedt@...dmis.org>, Andi Kleen <andi@...stfloor.org>, "Chandramouleeswaran, Aswin" <aswin@...com>, "Norton, Scott J" <scott.norton@...com> Subject: Re: [PATCH v7 1/4] spinlock: A new lockref structure for lockless update of refcount On Fri, Aug 30, 2013 at 1:15 PM, Waiman Long <waiman.long@...com> wrote: > > The prepend_path() isn't all due to getcwd. The correct profile should be Ugh. I really think that prepend_path() should just be rewritten to run entirely under RCU. Then we can remove *all* the stupid locking, and replace it with doing a read-lock on the rename sequence count, and repeating if requited. That shouldn't even be hard to do, it just requires mindless massaging and being careful. Linus -- 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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