Hi all, I figured out. The following code helped me to answer my question. page = alloc_page(GFP_KERNEL); addr1 = page_address(page); addr2 = addr1 + (PAGE_SIZE/2); page = virt_to_page(addr1); printk(KERN_DEBUG "Page address 1: %lx\n", (unsigned long)page_address(page)); page = virt_to_page(addr2); printk(KERN_DEBUG "Page address 2: %lx\n", (unsigned long)page_address(page)); --- Mauricio Lin <mauriciolin2000@xxxxxxxxxxxx> escreveu: > Hi all, > > The virt_to_page(addr) macro gives the page descriptor associated > with > the linear address "addr". > > Let's assume the initial and final linear address of a certain page > are > respectively A and B. If a value x, where A < x < B, is provided as > the > argument of virt_to_page() as virt_to_page(x), is the page descriptor > the same as virt_to_page(A)? As I have tested the code, the page descriptor is the same in this case. > > In this case, is there diffence in using virt_to_page(x) or > virt_to_page(A)? No difference, since the page descriptor points to the same page. BR, Mauricio Lin. _______________________________________________________ Yahoo! Copa 2006: cobertura dos jogos em tempo real e tudo sobre a seleção brasileira! http://br.esportes.yahoo.com/copa2006/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
