Date: Tue, 7 Jul 1998 16:53:16 -0400 (EDT) From: zhihuizhang <bf20761@binghamton.edu> To: hackers <freebsd-hackers@FreeBSD.ORG> Subject: Default Pagers Message-ID: <Pine.SOL.L3.93.980707164658.24846B-100000@bingsun1>
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While reading file default_pager.c, I find there is really little code in that file. I wonder why default pager is used and why we have to convert an object into a swap pager and when to do so. I search the Archives extensively and do find something which I quote below: A "default pager" has now been created which cleans up the transition of objects to the "swap" type. The previous checks throughout the code for swp->pg_data != NULL were really ugly. This change also provides the rudiments for future backing of "anonymous" memory by something other than the swap pager (via the vnode pager, for example), and it allows the decision about which of these pagers to use to be made dynamically (although will need some additional decision code to do this, of course). The 4.4 BSD book also talks little about this topic. I hope someone can enlighten me a little bit more. Thanks in advance. ------------------------------------------------- Zhihui Zhang Department of Computer Science State University of New York at Binghamton Web Site: http://cs.binghamton.edu/~zzhang ------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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