From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: huge improvement with per-device dirty throttling References: <1187764638.6869.17.camel@hannibal> From: Andi Kleen Date: 22 Aug 2007 13:05:13 +0200 In-Reply-To: <1187764638.6869.17.camel@hannibal> Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org Return-Path: To: "Jeffrey W. Baker" Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: "Jeffrey W. Baker" writes: > > My system is a Core 2 Duo, 2GB, single SATA disk. Hmm, I thought the patch was only supposed to make a real difference if you have multiple devices? But you only got a single disk. At least that was the case it was supposed to fix: starvation of fast devices from slow devices. Ok perhaps the new adaptive dirty limits helps your single disk a lot too. But your improvements seem to be more "collateral damage" @) But if that was true it might be enough to just change the dirty limits to get the same effect on your system. You might want to play with /proc/sys/vm/dirty_* -Andi -- 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