On Sat, 2012-09-08 at 12:57 -0700, Linus Torvalds wrote: > Whatever. Something like this (TOTALLY UNTESTED) attached patch should > get the mtdchar overflows to go away, It looks good to me. Acked-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx> Sasha, can you please give this a try? > but it does *not* fix the fact > that the MTRR start/end model is broken. It really is technically > valid to have a resource_size_t range of 0xfffffffffffff000+0x1000, > and right now it causes a BUG_ON() in pat.c. > > Suresh? yes but that is not a valid range I think because of the supported physical address bit limits of the processor and also the max architecture limit of 52 address bits. I guess we should be checking for those limits in pat.c, especially bits above 52 are ignored by the HW and they can easily cause conflicting aliases with other valid regions. I will get back with a different patch to fix this. thanks, suresh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>