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

[Ingo Molnar]

* Josef Bacik <jbacik@xxxxxxxxxxxx> 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@xxxxxxxxxxxx>

Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/