From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id 9E0A26B01AD for ; Fri, 4 Jun 2010 21:15:04 -0400 (EDT) Date: Sat, 5 Jun 2010 11:14:47 +1000 From: Nick Piggin Subject: Re: [PATCH 0/2 RFC v3] Livelock avoidance for data integrity writeback Message-ID: <20100605011447.GF26335@laptop> References: <1275677231-15662-1-git-send-email-jack@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1275677231-15662-1-git-send-email-jack@suse.cz> Sender: owner-linux-mm@kvack.org To: Jan Kara Cc: linux-fsdevel@vger.kernel.org, Andrew Morton , david@fromorbit.com, linux-mm@kvack.org List-ID: On Fri, Jun 04, 2010 at 08:47:09PM +0200, Jan Kara wrote: > > Hi, > > I've revived my patches to implement livelock avoidance for data integrity > writes. Due to some concerns whether tagging of pages before writeout cannot > be too costly to use for WB_SYNC_NONE mode (where we stop after nr_to_write > pages) I've changed the patch to use page tagging only in WB_SYNC_ALL mode > where we are sure that we write out all the tagged pages. Later, we can think > about using tagging for livelock avoidance for WB_SYNC_NONE mode as well... Hmm what concerns? Do you have any numbers? -- 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