Jason Mawdsley wrote: > > > > I am creating a virtual memory manager. > > > > > > Currently I am doing a > > > mmap(...PROT_NONE, MAP_ANON ) to reserve the memory. > > > then when committing the memory I am using mprotect( ...PROT_READ | > > > PROT_WRITE ) > > > > mmap For reservation of memory; you should > > mmap the fd for /dev/zero, with MAP_ANON > > to grab pages initially. > > The man pages state that the fd must be -1 for MAP_ANON. > an open() /dev/zero will return an valid file descriptor. So how would I > mmap using /dev/zero?
Mmap'ing /dev/zero gives you anopnymous pages; they can't be not private. It's pretty much the same thing. I would use /dev/zero, since it's portable. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
