On Fri, Jul 25, 2003 at 03:52:33PM -0700, Teresa Tao wrote: > How about if I specify the following flags in my mmap routine just like what the pgprot_noncached micro did. > pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK; > pgprot_val(vma->vm_page_prot) |= _CACHE_UNCACHED; > > Will this have kernel make the mmap'd memory non-cacheable? Or is there a mmap non-cacheable patch? > I think this might work. Did you try it? The performance will be bad though as mmap() is used widely by userland. Jun
