On Wed, 22 Jan 2014, Mel Gorman wrote: > Large block support was proposed years ago by Christoph Lameter > (http://lwn.net/Articles/232757/). I think I was just getting started > in the community at the time so I do not recall any of the details. I do > believe it motivated an alternative by Nick Piggin called fsblock though > (http://lwn.net/Articles/321390/). At the very least it would be nice to > know why neither were never merged for those of us that were not around > at the time and who may not have the chance to dive through mailing list > archives between now and March. It was rejected first because of the necessity of higher order page allocations. Nick and I then added ways to virtually map higher order pages if the page allocator could no longe provide those. All of this required changes to the basic page cache operations. I added a way for the mapping to indicate an order for an address range and then modified the page cache operations to be able to operate on any order pages. The patchset that introduced the ability to specify different orders for the pagecache address ranges was not accepted by Andrew because he thought there was no chance for the rest of the modifications to become acceptable. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
