[PATCH 2/5] xfs: simplify and remove xfs_ireclaim

[Christoph Hellwig]

On Thu, Jul 15, 2010 at 10:38:17AM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> xfs_ireclaim has to get and put te pag structure because it is only
> called with the inode to reclaim. The one caller of this function
> already has a reference on the pag and a pointer to is, so move the
> radix tree delete to the caller and remove xfs_ireclaim completely.
> This avoids a xfs_perag_get/put on every inode being reclaimed.
> 
> The overhead was noticed in a bug report at:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=16348

Looks good, I had looked into this earlier but never finished it.

There's also some opportunity to optimize roundtrips on the ilock in
this path.

Reviewed-by: Christoph Hellwig <hch at lst.de>