From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [patch 0/9] mm: thrash detection-based file cache sizing v3 Date: Fri, 9 Aug 2013 15:53:09 -0700 Message-ID: <20130809155309.71d93380425ef8e19c0ff44c@linux-foundation.org> References: <1375829050-12654-1-git-send-email-hannes@cmpxchg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: linux-mm@kvack.org, Andi Kleen , Andrea Arcangeli , Greg Thelen , Christoph Hellwig , Hugh Dickins , Jan Kara , KOSAKI Motohiro , Mel Gorman , Minchan Kim , Peter Zijlstra , Rik van Riel , Michel Lespinasse , Seth Jennings , Roman Gushchin , Ozgun Erdogan , Metin Doslu , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org To: Johannes Weiner Return-path: In-Reply-To: <1375829050-12654-1-git-send-email-hannes@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org On Tue, 6 Aug 2013 18:44:01 -0400 Johannes Weiner wrote: > This series solves the problem by maintaining a history of pages > evicted from the inactive list, enabling the VM to tell streaming IO > from thrashing and rebalance the page cache lists when appropriate. Looks nice. The lack of testing results is conspicuous ;) It only really solves the problem in the case where size-of-inactive-list < size-of-working-set < size-of-total-memory yes? In fact less than that, because the active list presumably doesn't get shrunk to zero (how far *can* it go?). I wonder how many workloads fit into those constraints in the real world. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org