On Fri, 26 Jan 2007, Andrew Morton wrote: > - They add zillions of ifdefs
They just add a few for ZONE_DMA where we alreaday have similar ifdefs for ZONE_DMA32 and ZONE_HIGHMEM. > - They make the VM's behaviour diverge between different platforms and > between differen configs on the same platforms, and hence degrade > maintainability and increase complexity. They avoid unecessary complexity on platforms. They could be made to work on more platforms with measures to deal with what ZONE_DMA provides in different ways. There are 6 or so platforms that do not need ZONE_DMA at all. > - We kicked around some quite different ways of implementing the same > things, but nothing came of it. iirc, one was to remove the hard-coded > zones altogether and rework all the MM to operate in terms of > > for (idx = 0; idx < NUMBER_OF_ZONES; idx++) > ... Hmmm.. How would that be simpler? > - I haven't seen any hard numbers to justify the change. I have send you numbers showing significant reductions in code size. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
