[Ocfs2-devel] [PATCH] ocfs2/dlm: make existing convertion precedent over new lock

[Joel Becker <Joel.Becker@oracle.com>]

On Wed, Dec 08, 2010 at 08:34:39PM +0800, Wengang Wang wrote:
> Make existing convertion precedent over new lock. It makes o2dlm locking more
> like fair locking.

	Is this a problem you were solving, or just something you
thought about while reading the code?  If it was a problem you ran
into, can you give the details?

Joel

> 
> Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
> ---
>  fs/ocfs2/dlm/dlmlock.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
> index 69cf369..7009292 100644
> --- a/fs/ocfs2/dlm/dlmlock.c
> +++ b/fs/ocfs2/dlm/dlmlock.c
> @@ -106,6 +106,9 @@ static int dlm_can_grant_new_lock(struct dlm_lock_resource *res,
>  
>  		if (!dlm_lock_compatible(tmplock->ml.type, lock->ml.type))
>  			return 0;
> +		if (!dlm_lock_compatible(tmplock->ml.convert_type,
> +					 lock->ml.type))
> +			return 0;
>  	}
>  
>  	return 1;
> -- 
> 1.7.2.3
> 
> 
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-- 

Life's Little Instruction Book #207

	"Swing for the fence."

Joel Becker
Senior Development Manager
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127