On Thu, 9 Apr 2009 06:58:40 +0300 Izik Eidus <ieidus@xxxxxxxxxx> wrote: > replace_page() allow changing the mapping of pte from one physical page > into diffrent physical page. At a high level, this is very similar to what page migration does. Yet this implementation shares nothing with the page migration code. Can this situation be improved? > this function is working by removing oldpage from the rmap and calling > put_page on it, and by setting the pte to point into newpage and by > inserting it to the rmap using page_add_file_rmap(). > > note: newpage must be non anonymous page, the reason for this is: > replace_page() is built to allow mapping one page into more than one > virtual addresses, the mapping of this page can happen in diffrent > offsets inside each vma, and therefore we cannot trust the page->index > anymore. > > the side effect of this issue is that newpage cannot be anything but > kernel allocated page that is not swappable. > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
