[xfs-masters] RFC: Fix f_flags races without the BKL

[Andi Kleen]

On Tue, Dec 30, 2008 at 05:59:56AM -0700, Jonathan Corbet wrote:
> On Mon, 29 Dec 2008 16:27:32 +0100
> Andi Kleen <andi at firstfloor.org> wrote:
> 
> > I would prefer O_LOCK_FLAGS bit too. The global lock is not very nice
> > and I don't doubt someone will come up with a workload which
> > pounds on it.
> 
> Seems hard to imagine that it would be worse than the longstanding BKL
> situation.  

As long as noone else uses it too BKL is faster than a mutex.

-Andi

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