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Date: Mon, 6 Aug 2007 22:12:52 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: mel@...net.ie (Mel Gorman) Cc: Andi Kleen <ak@...e.de>, Lee.Schermerhorn@...com, clameter@....com, kamezawa.hiroyu@...fujitsu.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE On Mon, 6 Aug 2007 22:55:41 +0100 mel@...net.ie (Mel Gorman) wrote: > On (06/08/07 22:31), Andi Kleen didst pronounce: > > > > > If correct, I would suggest merging the horrible hack for .23 then taking > > > it out when we merge "grouping pages by mobility". But what if we don't do > > > that merge? > > > > Or disable ZONE_MOVABLE until it is usable? > > It's usable now. The issue with policies only occurs if the user specifies > kernelcore= or movablecore= on the command-line. Your language suggests > that you believe policies are not applied when ZONE_MOVABLE is configured > at build-time. So.. the problem which we're fixing here is only present when someone use kernelcore=. This is in fact an argument for _not_ merging the horrible-hack. How commonly do we expect people to specify kernelcore=? If "not much" then it isn't worth adding the __alloc_pages() overhead? (It's a pretty darn small overhead, I must say) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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