Date: Fri, 9 Nov 2001 15:01:22 -0500 From: "Jason Mawdsley" <jason@macadamian.com> To: <tlambert2@mindspring.com> Cc: <freebsd-hackers@FreeBSD.ORG> Subject: Re: mmap/madvise Message-ID: <019401c16959$4e64a8b0$2a64a8c0@macadamian.com> References: <200111081947.fA8JlAe03457@web.cs.ndsu.nodak.edu> <02ae01c16891$4c1f4970$2a64a8c0@macadamian.com> <3BEB0A57.3C510C49@mindspring.com>
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> > 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? > Too bad there isn't an "Advance UNIX programming for Windows > Programmers" book. 8-(. Sounds like their could be a good market for one ;-) Jason Jason Mawdsley ~ jason@macadamian.com Software Designer ~ m_ a c a d a m i a n t e c h n o l o g i e s "Software developers for the world's leading technology companies." http://www.macadamian.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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