Messages in this thread | | | Date | Thu, 26 Sep 2013 16:16:06 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/2] rwsem: add rwsem_is_contended V3 |
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* 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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