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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i16-20020a17090aee9000b002528f697d12si3526444pjz.160.2023.05.26.01.18.01; Fri, 26 May 2023 01:18:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=wgA2+lE9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242446AbjEZIHA (ORCPT + 99 others); Fri, 26 May 2023 04:07:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229911AbjEZIG5 (ORCPT ); Fri, 26 May 2023 04:06:57 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4962D3; Fri, 26 May 2023 01:06:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=Ji88nppxg0Yr6rTy2oo71cGSBHNzbZinz0tBY64Q5co=; b=wgA2+lE9Qdy04dO9PIx26l4kFK qd9OlyNBVEu9rnvWXmHQocHWn9kpyixJbCFl1sJYUjM+epXC7Rfqx8cnimKoqt2sZwPqyh6SzRtRL LeMPddZm6FrCStPNtL1GWHHlW+2+1lO5rxBx7b/Nj5IELb4taG8TuZtKarI6eXWFqO0suqd8OlxsI RshvQSO1reLoup/KZv6rDLuGkTy6lVVm2Zl2QuRf6QiHM3SRkxonNddEOsXPNLw1XxYNwJOFvGOyb 9c/3x7GZGd8WUnJj84uXa2df622cCgk2nkLlecH5NLVqtMqJdjEvfZ9GxmO6OcPyMaGFS9mfcK9RG /W2PwGnQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1q2STG-001YPx-2C; Fri, 26 May 2023 08:06:46 +0000 Date: Fri, 26 May 2023 01:06:46 -0700 From: Christoph Hellwig To: Kent Overstreet Cc: Christoph Hellwig , Jan Kara , cluster-devel@redhat.com, "Darrick J . Wong" , linux-kernel@vger.kernel.org, dhowells@redhat.com, linux-bcachefs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Kent Overstreet Subject: Re: [Cluster-devel] [PATCH 06/32] sched: Add task_struct->faults_disabled_mapping Message-ID: References: <20230509165657.1735798-7-kent.overstreet@linux.dev> <20230510010737.heniyuxazlprrbd6@quack3> <20230523133431.wwrkjtptu6vqqh5e@quack3> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 25, 2023 at 04:50:39PM -0400, Kent Overstreet wrote: > A cache that isn't actually consistent is a _bug_. You're being > Obsequious. And any time this has come up in previous discussions > (including at LSF), that was never up for debate, the only question has > been whether it was even possible to practically fix it. That is not my impression. But again, if you think it is useful, go ahead and seel people on the idea. But please prepare a series that includes the rationale, performance tradeoffs and real live implications for it. And do it on the existing code that people use and not just your shiny new thing.