From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with SMTP id 1028D8D0039 for ; Fri, 25 Feb 2011 15:07:55 -0500 (EST) Date: Fri, 25 Feb 2011 21:07:23 +0100 From: Andrea Arcangeli Subject: Re: [PATCH 0/2] Reduce the amount of time compaction disables IRQs for V2 Message-ID: <20110225200722.GU23252@random.random> References: <1298664299-10270-1-git-send-email-mel@csn.ul.ie> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1298664299-10270-1-git-send-email-mel@csn.ul.ie> Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Andrew Morton , Arthur Marsh , Clemens Ladisch , Linux-MM , Linux Kernel Mailing List On Fri, Feb 25, 2011 at 08:04:57PM +0000, Mel Gorman wrote: > Changelog since V1 > o Fix initialisation of isolated (Andrea) > > The following two patches are aimed at reducing the amount of time IRQs are > disabled. It was reported by some ALSA people that transparent hugepages was > causing slowdowns on MIDI playback but I strongly suspect that compaction > running for smaller orders was also a factor. The theory was that IRQs > were being disabled for too long and sure enough, compaction was found to > be disabling IRQs for a long time. The patches reduce the length of time > IRQs are disabled when scanning for free pages and for pages to migrate. > > It's late in the cycle but the IRQs disabled times are sufficiently bad > that it would be desirable to have these merged for 2.6.38 if possible. > > mm/compaction.c | 35 ++++++++++++++++++++++++++++++----- > 1 files changed, 30 insertions(+), 5 deletions(-) both patches: Acked-by: Andrea Arcangeli -- 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