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Date: Mon, 07 Oct 2013 18:24:49 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Minchan Kim <minchan@...nel.org> CC: John Stultz <john.stultz@...aro.org>, LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Android Kernel Team <kernel-team@...roid.com>, Robert Love <rlove@...gle.com>, Mel Gorman <mel@....ul.ie>, Hugh Dickins <hughd@...gle.com>, Dave Hansen <dave.hansen@...el.com>, Rik van Riel <riel@...hat.com>, Dmitry Adamushko <dmitry.adamushko@...il.com>, Dave Chinner <david@...morbit.com>, Neil Brown <neilb@...e.de>, Andrea Righi <andrea@...terlinux.com>, Andrea Arcangeli <aarcange@...hat.com>, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>, Mike Hommey <mh@...ndium.org>, Taras Glek <tglek@...illa.com>, Dhaval Giani <dhaval.giani@...il.com>, Jan Kara <jack@...e.cz>, KOSAKI Motohiro <kosaki.motohiro@...il.com>, Michel Lespinasse <walken@...gle.com>, Rob Clark <robdclark@...il.com>, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: Re: [PATCH 05/14] vrange: Add new vrange(2) system call On 10/07/2013 05:13 PM, Minchan Kim wrote: >> >> The point is that MADV_DONTNEED is very similar in that sense, >> especially if allowed to be lazy. It makes a lot of sense to permit >> both scrubbing modes orthogonally. >> >> The point you're making has to do with withdrawal of permission to flush >> on demand, which is a result of having the lazy mode (ongoing >> permission) and having to be able to withdraw such permission. > > I'm sorry I could not understand what you wanted to say. > Could you elaborate a bit? > Basically, you need this because of MADV_LAZY or the equivalent, so it would be applicable to a similar variant of madvise(). As such I would suggest that an madvise4() call would be appropriate. -hpa -- 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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