From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 6139A6B016A for ; Thu, 1 Sep 2011 19:28:51 -0400 (EDT) Date: Thu, 1 Sep 2011 16:28:08 -0700 From: Andrew Morton Subject: Re: [PATCH] thp: tail page refcounting fix #5 Message-Id: <20110901162808.80a2117c.akpm@linux-foundation.org> In-Reply-To: <20110901152417.GF10779@redhat.com> References: <20110824000914.GH23870@redhat.com> <20110824002717.GI23870@redhat.com> <20110824133459.GP23870@redhat.com> <20110826062436.GA5847@google.com> <20110826161048.GE23870@redhat.com> <20110826185430.GA2854@redhat.com> <20110827094152.GA16402@google.com> <20110827173421.GA2967@redhat.com> <20110901152417.GF10779@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: Minchan Kim , Michel Lespinasse , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Hugh Dickins , Johannes Weiner , Rik van Riel , Mel Gorman , KOSAKI Motohiro , Shaohua Li , "Paul E. McKenney" , Andi Kleen On Thu, 1 Sep 2011 17:24:17 +0200 Andrea Arcangeli wrote: > Ideally direct-io should stop calling get_page() on pages > returned by get_user_pages(). Yeah. get_user_pages() is sufficient. Ideally we should be able to undo the get_user_pages() get_page() from within the IO completion interrupt and we're done. Cc Andi, who is our resident dio tweaker ;) -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org