Messages in this thread | | | Date | Thu, 22 Jun 2006 17:50:22 +0200 | Subject | Re: 2.6.17-mm1 | From | Franck Bui-Huu <> |
| |
Mel Gorman wrote: > On Thu, 22 Jun 2006, Franck Bui-Huu wrote: >> >> Should ARCH_PFN_OFFSET macro be used instead in order to make pfn/page >> convertions work when node 0 start offset do not start at 0 ? >> > > What happens if you have ARCH_PFN_OFFSET as > > #define ARCH_PFN_OFFSET (0UL) > > ?
It's the default value (see memory_model.h). It means that pfn start for node 0 is 0, therefore your physical memory address starts at 0.
> > What arch is this? >
well I'm working on MIPS, but you can take a look at ARM that does the same thing better...
>> My physical memory start at 0x20000000. So node 0 starts at an offset >> different from 0. I setup ARCH_PFN_OFFSET this way >> >> #define ARCH_PFN_OFFSET (0x20000000 << PAGE_SHIFT) >> > > If physical memory starts at 0x20000000, why is the PFN not > 0x20000000 >> PAGE_SHIFT ? >
It is a typo...
Franck
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |