Messages in this thread | | | Date | Mon, 9 Jun 2008 22:38:19 +0900 | From | "KOSAKI Motohiro" <> | Subject | Re: [PATCH -mm 04/25] free swap space on swap-in/activation |
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Hi Kim-san,
>> - Can completely optimise the thing away if !CONFIG_SWAP. > > I think we can optimize more and more in case of if !CONFIG_SWAP. > If system are !CONFIG_SWAP, we can never swap out anonymous pages. > > Don't we manage anonymous pages with list ? > > Such system don't need to insert anonymous pages into lru list when fault occur. > It is just needless overhead. > > Also, If we can't reclaim anonymous pages, don't we need anon rmap facility ? > I don't know well which subsystems used rmap. > > If pageout only use anonymous rmap for pageout, > we can remove anonymous rmapping code in case of !CONFIG_SWAP
You are right. but I think rmap isn't bottle neck in embedded system. Why do you want remove that?
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