On Tue, Jan 23, 2007 at 10:15:33PM +0800, Yu-Chen Wu wrote: > printk(KERN_INFO "vmalloc_to_page tpage :%x\n",tpage); > //===========info of dmesg================== <snip> > [ 1561.768492] page allocated:60ea9000 > [ 1561.768497] vmalloc_to_page tpage :7fcf7e18 > > Why the page address get from vmalloc_to_page is different with the first > page address of the vm_struct (73d65000)? >
Memory returned by vmalloc is only virtually contiguous, not physically contiguous. If you're allocating memory for DMA, see the interface documented in Documentation/DMA-mapping.txt for more information. -- Kyle - 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/
