From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91D5BC19759 for ; Thu, 1 Aug 2019 18:12:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71E9F20644 for ; Thu, 1 Aug 2019 18:12:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388063AbfHASMz (ORCPT ); Thu, 1 Aug 2019 14:12:55 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:37536 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732044AbfHASMz (ORCPT ); Thu, 1 Aug 2019 14:12:55 -0400 Received: from pd9ef1cb8.dip0.t-ipconnect.de ([217.239.28.184] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1htFYi-0006nw-Cj; Thu, 01 Aug 2019 20:12:12 +0200 Date: Thu, 1 Aug 2019 20:12:11 +0200 (CEST) From: Thomas Gleixner To: Jan Kara cc: LKML , Peter Zijlstra , Ingo Molnar , Sebastian Siewior , Anna-Maria Gleixner , Steven Rostedt , Julia Cartwright , Jan Kara , Theodore Tso , Mark Fasheh , Joseph Qi , Joel Becker , linux-ext4@vger.kernel.org, Matthew Wilcox , Alexander Viro , linux-fsdevel@vger.kernel.org Subject: Re: [patch V2 6/7] fs/jbd2: Make state lock a spinlock In-Reply-To: <20190801175703.GH25064@quack2.suse.cz> Message-ID: References: <20190801010126.245731659@linutronix.de> <20190801010944.457499601@linutronix.de> <20190801175703.GH25064@quack2.suse.cz> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Thu, 1 Aug 2019, Jan Kara wrote: > On Thu 01-08-19 03:01:32, Thomas Gleixner wrote: > > As almost all functions which use this lock have a journal head pointer > > readily available, it makes more sense to remove the lock helper inlines > > and write out spin_*lock() at all call sites. > > > > Just a heads up that I didn't miss this patch. Just it has some bugs and I > figured that rather than explaining to you subtleties of jh lifetime it is > easier to fix up the problems myself since you're probably not keen on > becoming jbd2 developer ;)... which was more complex than I thought so I'm > not completely done yet. Hopefuly tomorrow. I'm curious where I was too naive :) Thanks for having a look! tglx