On Friday 10 June 2005 19:16, Mauricio Lin wrote: > Hi lk, > > Do you mean that pages (new copies of pages) generated through page fault handler are not cow, right? Sounds right. > COW page is that one shared among processes for read access and invokes the page fault handler because a process tried to write to it, right? yep. The MMU is told it is read-only, while the (I think) page tables have it marked read-write. The fault handler seeing this understands it to be a COW page, makes a read-write copy for the faulting process. > I thought that cow pages are those pages (new copies of pages) generated by page fault handler. > I think it would be better to say that COW pages are de-COWed by the page fault handler. The copy that the page fault handler makes would not be a COW page. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
