Re: Btrfs v0.16 released

[Peter Zijlstra]

On Tue, 2008-08-05 at 15:01 -0400, Chris Mason wrote:

> * Fine grained btree locking.  The large fs_mutex is finally gone.
> There is still some work to do on the locking during extent allocation,
> but the code is much more scalable than it was.

Cool - will try to find a cycle to stare at the code ;-)

> * Helper threads for checksumming and other background tasks.  Most CPU
> intensive operations have been pushed off to helper threads to take
> advantage of SMP machines.  Streaming read and write throughput now
> scale to disk speed even with checksumming on.

Can this lead to the same Priority Inversion issues as seen with
kjournald?

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