Hi Christoph, On Tue, Jul 27, 2010 at 1:40 AM, Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> wrote: > On Tue, 27 Jul 2010, Minchan Kim wrote: > >> This patch registers address of mem_section to memmap itself's page struct's >> pg->private field. This means the page is used for memmap of the section. >> Otherwise, the page is used for other purpose and memmap has a hole. > > What if page->private just happens to be the value of the page struct? > Even if that is not possible today, someday someone may add new > functionality to the kernel where page->pivage == page is used for some > reason. I agree. > > Checking for PG_reserved wont work? Okay. It would be better to consider page point itself with PG_reserved. I will reflect your opinion next version. :) Thanks, Christoph. -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>