Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754547Ab3F1Aa0 (ORCPT ); Thu, 27 Jun 2013 20:30:26 -0400 Received: from mail.parknet.co.jp ([210.171.160.6]:48002 "EHLO mail.parknet.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754505Ab3F1AaV (ORCPT ); Thu, 27 Jun 2013 20:30:21 -0400 From: OGAWA Hirofumi To: "Theodore Ts'o" Cc: Dave Chinner , Al Viro , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, tux3@tux3.org Subject: Re: [PATCH] Optimize wait_sb_inodes() References: <20130626231143.GC28426@dastard> <87wqpg76ls.fsf@devron.myhome.or.jp> <20130627044705.GB29790@dastard> <87y59w5dye.fsf@devron.myhome.or.jp> <20130627063816.GD29790@dastard> <87ppv83tnn.fsf@devron.myhome.or.jp> <20130627094042.GZ29338@dastard> <87mwqb3m1e.fsf@devron.myhome.or.jp> <20130627183631.GB22832@thunk.org> <871u7nrupn.fsf@devron.myhome.or.jp> <20130627234521.GC22832@thunk.org> Date: Fri, 28 Jun 2013 09:30:17 +0900 In-Reply-To: <20130627234521.GC22832@thunk.org> (Theodore Ts'o's message of "Thu, 27 Jun 2013 19:45:21 -0400") Message-ID: <87hagjqdpi.fsf@devron.myhome.or.jp> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1039 Lines: 26 Theodore Ts'o writes: > On Fri, Jun 28, 2013 at 08:37:40AM +0900, OGAWA Hirofumi wrote: >> >> Well, anyway, it is simple. This issue was came as the performance >> regression when I was experimenting to use kernel bdi flusher from own >> flusher. The issue was sync(2) like I said. And this was just I >> couldn't solve this issue by tux3 side unlike other optimizations. > > A performance regression using fsstress? That's not a program > intended to be a useful benchmark for measuring performance. Right. fsstress is used as stress tool for me too as part of CI, with background vmstat 1. Anyway, it is why I noticed this. I agree it would not be high priority. But I don't think we should stop to optimize it. Thanks. -- OGAWA Hirofumi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/