From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:37108) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TGPfN-0001hb-Q1 for qemu-devel@nongnu.org; Tue, 25 Sep 2012 03:34:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TGPfH-0006h5-Oy for qemu-devel@nongnu.org; Tue, 25 Sep 2012 03:34:49 -0400 Received: from lgemrelse1q.lge.com ([156.147.1.111]:47600) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TGPfH-0006gv-Em for qemu-devel@nongnu.org; Tue, 25 Sep 2012 03:34:43 -0400 Date: Tue, 25 Sep 2012 16:37:47 +0900 From: Minchan Kim Message-ID: <20120925073747.GO13234@bbox> References: <1348224383-1499-1-git-send-email-mgorman@suse.de> <1348224383-1499-8-git-send-email-mgorman@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1348224383-1499-8-git-send-email-mgorman@suse.de> Subject: Re: [Qemu-devel] [PATCH 7/9] Revert "mm: have order > 0 compaction start off where it left" List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Mel Gorman Cc: Richard Davies , KVM , QEMU-devel , LKML , Linux-MM , Avi Kivity , Andrew Morton , Shaohua Li On Fri, Sep 21, 2012 at 11:46:21AM +0100, Mel Gorman wrote: > This reverts commit 7db8889a (mm: have order > 0 compaction start off > where it left) and commit de74f1cc (mm: have order > 0 compaction start > near a pageblock with free pages). These patches were a good idea and > tests confirmed that they massively reduced the amount of scanning but > the implementation is complex and tricky to understand. A later patch > will cache what pageblocks should be skipped and reimplements the > concept of compact_cached_free_pfn on top for both migration and > free scanners. > > Signed-off-by: Mel Gorman > Acked-by: Rik van Riel Acked-by: Minchan Kim -- Kind regards, Minchan Kim