[PATCH 1/6] xfs: optimize AGFL refills

[Alex Elder]

On Tue, 2011-03-22 at 15:55 -0400, Christoph Hellwig wrote:
> Avoid forcing out busy extent when moving blocks from/to the AGFL.  We

Without thinking a bit about it, it wasn't clear why doing
this was OK to do.  It would be nice to record a one-sentence
justification of why we don't need to force busy extents out
in this case.

> archive this my moving the busy search out of xfs_alloc_get_freelist into

 achieve this

> the callers that need it, and by moving the busy list insert from
> xfs_free_ag_extent extent which is used both by AGFL refills and real
                     ^^^^^ drop this word

> allocation to xfs_free_extent, which is only used by the latter.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Otherwise the change itself looks good.

Reviewed-by: Alex Elder <aelder at sgi.com>


. . .