Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754060AbcDYIHx (ORCPT ); Mon, 25 Apr 2016 04:07:53 -0400 Received: from mail-yw0-f194.google.com ([209.85.161.194]:35897 "EHLO mail-yw0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753663AbcDYIHt (ORCPT ); Mon, 25 Apr 2016 04:07:49 -0400 MIME-Version: 1.0 Reply-To: sedat.dilek@gmail.com In-Reply-To: References: <56E7C009.3070008@gmail.com> <56F70255.6070806@gmail.com> <20160330184732.GO7822@mtj.duckdns.org> <570B5A9A.6070104@gmail.com> <20160412002428.GQ24661@htj.duckdns.org> <20160412110903.GR24661@htj.duckdns.org> <57154C51.5020609@gmail.com> Date: Mon, 25 Apr 2016 10:07:48 +0200 Message-ID: Subject: Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?) From: Sedat Dilek To: Howard Cochran Cc: Jakob Unterwurzacher , Tejun Heo , Ashish Sangwan , Miklos Szeredi , fuse-devel , Linux-Fsdevel , Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 902 Lines: 31 On Wed, Apr 20, 2016 at 3:35 AM, Howard Cochran wrote: > On Mon, Apr 18, 2016 at 5:06 PM, Jakob Unterwurzacher > wrote: >> On 12.04.2016 13:09, Tejun Heo wrote: >>>> >>>> Probably you want to look into: >>>> https://lkml.org/lkml/2016/3/10/21 >>>> >>>> The patch mentioned above solves the issue for me. >>> >>> Heh, I tracked it down to wb_over_bg_thresh() and fell asleep. Yeah, >>> that is the right fix. >> >> Works wonderfully now, thanks to everybody involved. Is it too late for 4.6? >> >> Best regards, >> Jakob >> > Jakob, et. al. > > You're welcome. That performance problem stumped me for a couple of > weeks until tracked it down and submitted the fix. > What has happened to "writeback: Fix performance regression in wb_over_bg_thresh()"? I checked Linux v4.6-rc5, it is not included. Is it in another Git tree? If yes, where? - sed@ -