Tracking pages from get_user_pages()

Posted Apr 20, 2019 2:50 UTC (Sat) by quotemstr (subscriber, #45331)
Parent article: Tracking pages from get_user_pages()

Can't we clear PROT_WRITE from user pages with in-flight disk writes? rmap would let us find all the PTEs that point to such a page.

Posted Apr 20, 2019 3:35 UTC (Sat) by corbet (editor, #1) [Link]

That is done now, but the mappings in question aren't affected by it. Devices don't care about protections in page-table entries.