On Fri, 9 Apr 2010, Konrad Rzeszutek Wilk wrote: > On Fri, Apr 09, 2010 at 03:34:06PM -0400, Alan Stern wrote: > > On Fri, 9 Apr 2010, Pedro Ribeiro wrote: > > > > > > The DMA pointers do indeed look sane. I wanted to take a deeper look at > > > > this and set up a 64bit system today. However, I fail to see the problem > > > > here. Pedro, how much RAM does your machine have installed? > > > > > It has 4 GB. > > > > That means DMA mapping cannot be the cause of the problem. :-( > > That isn't entirely true. The BIOS usually allocates a 256 MB ACPI/PCI hole > that is under the 4GB. > > So end up with 3.7 GB, then the 256MB hole, and then right above the 4GB > you the the remaining memory: 4.3GB. How can Pedro find out what physical addresses are in use on his system? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
