[PATCH 6/6] xfs: make discard operations asynchronous

[Alex Elder]

On Tue, 2011-03-22 at 15:55 -0400, Christoph Hellwig wrote:
> Instead of waiting for each discard request keep the CIL context alive
> until all of them are done, at which point we can tear it down completly
> and remove the busy extents from the rbtree.
> 
> At this point I'm doing the I/O completion from IRQ context for simplicity,
> but I'll benchmark it against a version that uses a workqueue.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

This looks good.

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

. . .