Date: Thu, 8 Nov 2001 13:47:10 -0600 (CST) From: mark tinguely <tinguely@web.cs.ndsu.nodak.edu> To: bright@mu.org, jason@macadamian.com Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: mmap/madvise Message-ID: <200111081947.fA8JlAe03457@web.cs.ndsu.nodak.edu> In-Reply-To: <20011108122150.W89342@elvis.mu.org>
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Jason Mawdsley <jason@macadamian.com> asks: > > I am looking for a way to reserve memory, without actually allocating the > > swap space. Alfred Perlstein answers: > Just proceed normally, freebsd does overcommit such that you really > don't need to do anything special to get the results you desire. I assume Jason is writting a userland application, but I cannot tell how he was using the allocated memory. Alfred is correct in that allocated memory is not even physical until needed and only paged back if modified AND space becomes low. Without information of what he was doing, I was trying to read between the lines of his message and wonder if he needs the memory physically there and wired (using mprotect) to prevent the memory from being released. --mark tinguely. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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