On Tue, 24 Apr 2007 13:30:33 -0700 (PDT) Christoph Lameter <[EMAIL PROTECTED]> wrote:
> > > If the system has both high memory and normal memory then only > > > allocations > > > to highmemory are subject to memory policies etc etc. The block device > > > allocations would be in zone normal/dma and thus be exempt from NUMA > > > placement. > > > > Please just point us to the line where sys_move_pages enforces this. > > It does not. It will happily move the pages into highmem. The filesystem > cannot expect the page to remain in the same zone without holding a > reference count. Swap may also move pages between zones. There is nothing > special in what page migration does here. > > I would say that the filesystem is broke if it has such expectations > regardless of page migration. Others disagree ;) The filesystem has *told* the core kernel what its allocation constraints are by setting up mapping_gfp_mask(). If the core kernel stops honouring that request then it is core kernel which is broken. - 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/
