From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754152Ab0CZDbN (ORCPT ); Thu, 25 Mar 2010 23:31:13 -0400 Received: from mail-iw0-f196.google.com ([209.85.223.196]:53574 "EHLO mail-iw0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753729Ab0CZDbM (ORCPT ); Thu, 25 Mar 2010 23:31:12 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:subject:to:cc:in-reply-to:references; b=kIVNCaC3GLNqTx2hd3pRQEx73Qu1ix6mjhnUjTEZoQmJC2+kKiQ8ntHGOcaSv9znDh ROsoi+4rhQ1evs/tlIhBu8yol9mLPd+JzZ8blEhA2O540by80x3bKgi2Upx0ayFCbvvu uvHh0qSQd43xIf5xdgPVBGXzXWqSVS4gtx2CE= Message-ID: <4bac2a7e.8278e70a.5fa7.1315@mx.google.com> Date: Thu, 25 Mar 2010 20:31:10 -0700 (PDT) From: Ben Gamari Subject: Re: Poor interactive performance with I/O loads with fsync()ing To: Ingo Molnar , Nick Piggin Cc: tytso@mit.edu, linux-kernel@vger.kernel.org, Olly Betts , martin f krafft In-Reply-To: <20100317093704.GA17146@elte.hu> References: <4b9fa440.12135e0a.7fc8.ffffe745@mx.google.com> <20100317045350.GA2869@laptop> <20100317093704.GA17146@elte.hu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 17 Mar 2010 10:37:04 +0100, Ingo Molnar wrote: > > A call-graph profile will show the precise reason for IO latencies, and their > relatively likelihood. > Once I get home I'll try to reproduce the issue and get a call graph. Thanks! - Ben