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Date: Mon, 13 Jan 2014 10:25:06 +0900 From: Minchan Kim <minchan@...nel.org> To: Johannes Weiner <hannes@...xchg.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <andi@...stfloor.org>, Andrea Arcangeli <aarcange@...hat.com>, Bob Liu <bob.liu@...cle.com>, Christoph Hellwig <hch@...radead.org>, Dave Chinner <david@...morbit.com>, Greg Thelen <gthelen@...gle.com>, Hugh Dickins <hughd@...gle.com>, Jan Kara <jack@...e.cz>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Luigi Semenzato <semenzato@...gle.com>, Mel Gorman <mgorman@...e.de>, Metin Doslu <metin@...usdata.com>, Michel Lespinasse <walken@...gle.com>, Ozgun Erdogan <ozgun@...usdata.com>, Peter Zijlstra <peterz@...radead.org>, Rik van Riel <riel@...hat.com>, Roman Gushchin <klamm@...dex-team.ru>, Ryan Mallon <rmallon@...il.com>, Tejun Heo <tj@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [patch 4/9] mm: filemap: move radix tree hole searching here On Fri, Jan 10, 2014 at 01:10:38PM -0500, Johannes Weiner wrote: > The radix tree hole searching code is only used for page cache, for > example the readahead code trying to get a a picture of the area > surrounding a fault. > > It sufficed to rely on the radix tree definition of holes, which is > "empty tree slot". But this is about to change, though, as shadow > page descriptors will be stored in the page cache after the actual > pages get evicted from memory. > > Move the functions over to mm/filemap.c and make them native page > cache operations, where they can later be adapted to handle the new > definition of "page cache hole". > > Signed-off-by: Johannes Weiner <hannes@...xchg.org> Reviewed-by: Minchan Kim <minchan@...nel.org> -- Kind regards, Minchan Kim -- 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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