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 SMTP id CB2716B01AC for ; Tue, 6 Jul 2010 01:46:38 -0400 (EDT) Received: by iwn2 with SMTP id 2so5383764iwn.14 for ; Mon, 05 Jul 2010 22:46:37 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20100706093529.CCD1.A69D9226@jp.fujitsu.com> References: <20100702125155.69c02f85.akpm@linux-foundation.org> <20100705134949.GC13780@csn.ul.ie> <20100706093529.CCD1.A69D9226@jp.fujitsu.com> Date: Tue, 6 Jul 2010 14:46:37 +0900 Message-ID: Subject: Re: [PATCH 12/14] vmscan: Do not writeback pages in direct reclaim From: Minchan Kim Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: Mel Gorman , Andrew Morton , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Chris Mason , Nick Piggin , Rik van Riel , Johannes Weiner , Christoph Hellwig , KAMEZAWA Hiroyuki , Andrea Arcangeli List-ID: On Tue, Jul 6, 2010 at 9:36 AM, KOSAKI Motohiro wrote: > Hello, > >> Ok, that's reasonable as I'm still working on that patch. For example, the >> patch disabled anonymous page writeback which is unnecessary as the stack >> usage for anon writeback is less than file writeback. > > How do we examine swap-on-file? bool is_swap_on_file(struct page *page) { struct swap_info_struct *p; swp_entry_entry entry; entry.val = page_private(page); p = swap_info_get(entry); return !(p->flags & SWP_BLKDEV) } -- Kind regards, Minchan Kim -- 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