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SubjectRe: [PATCH 1/2] rwsem: add rwsem_is_contended V3

* Josef Bacik <jbacik@fusionio.com> wrote:

> Btrfs needs a simple way to know if it needs to let go of it's read lock on a
> rwsem. Introduce rwsem_is_contended to check to see if there are any waiters on
> this rwsem currently. This is just a hueristic, it is meant to be light and not
> 100% accurate and called by somebody already holding on to the rwsem in either
> read or write. Thanks,
>
> Signed-off-by: Josef Bacik <jbacik@fusionio.com>

Acked-by: Ingo Molnar <mingo@kernel.org>

Thanks,

Ingo


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