Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp803259ybl; Wed, 11 Dec 2019 07:45:16 -0800 (PST) X-Google-Smtp-Source: APXvYqxJO0ACb0MTAJqgywvgQHAXcjyEIWyixO2KZoW+i+Ic3x4QA1t590XZklJSLeJ4Aagzzu3K X-Received: by 2002:a9d:7984:: with SMTP id h4mr2776232otm.297.1576079116318; Wed, 11 Dec 2019 07:45:16 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1576079116; cv=none; d=google.com; s=arc-20160816; b=bjlDq2mJex39Ovs0j/hPHexYtylT+MxdrM+nBrfKvg6/mUT24d3QqpLnPBPX7Vn74Z JhpGgo0C+z0l5AmUHwqFuHkApmeTMhAl3PciKgE3JBEWLRdLi17hPNUUnhF+LCm1wTaY L5yFQOXL0vGXwm8q1JxC3WFnysNft5XcxQumLOtnUGMw9rYQgie8wx79AkFkd6uuh4/D nqCtSvWRFYY3HTrW2SRBymsQSwnuZW2VWXm4ERyDkxpLKRtm2+O8hL2CQ8UPL3DK9HzG bbn62PnIbATVMDHPbgqN1VGP2zbhc5wYafV5s9LJH5YG2QlI6KcOh7XsBY2hvd3yYzin FgJQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=fbVP3GO5TFya8NWOJb7Dgy0hxavImfzE2eK5UngY8Ac=; b=ykxT+g5v74oj4Cr2JjOjuGiQdZ8gsOuESKr4jvACmYnPXT1tEDm0KvuxAWylmjGKoM WgM0RutGbJ1GF1ceC5ABZWdPkFrINL62b9qdx1TuauC3w/0BjebaJeh4ymUEKjq+AXK2 dax7jBjfRo1qSitSFWEJlvApetF75GtCsaH666FvfzaOs6szaIo80q6dQegxgzGYRStu NAD3kBFp9jVvkIFDDaKa7q9QZ0IPKdFpzPT7Rg3G/p7LB82kk4AqnYZtY3EW21dWH2nc uGc8ZayKCOuKHkfTNCy9li2HJeNq8WX3J/OQsWMdexJbbCS0D+5fr0tfMZGp7UzCvSvt MWzQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=dT6kxVSF; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id s68si1402985oih.275.2019.12.11.07.45.04; Wed, 11 Dec 2019 07:45:16 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=dT6kxVSF; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388763AbfLKPn4 (ORCPT + 99 others); Wed, 11 Dec 2019 10:43:56 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:48272 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388750AbfLKPnw (ORCPT ); Wed, 11 Dec 2019 10:43:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; 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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=fbVP3GO5TFya8NWOJb7Dgy0hxavImfzE2eK5UngY8Ac=; b=dT6kxVSFdCksVqKKxmEQrpRgx 8j7nQlD3Y53CAmIuUQNzRGcF0+mBrf2PB8fh35nl9jDugd4IbKpijkwhp/K6MkSE37DCaYdKC/fkm MUosO3b0ux0UJeLtLbtS360YNNEZ9rkAAL3UoAfWtlb9HTj/ytw0ekCeUsuRBQjMX+M93d8Brpuru fIgPCAKqK3VlbMWJJcSRxnc2vXrYjqmnLxGDyk/fkk0IBiU09ydf4vGUiGQSP8I8OY9MxhZG07Hye m6YUo9o0P5T08fCo0oKOvf30C7DURyP+kxN6eXFY/t/CB+8MQr7ZSErgHkPCxn/DmEsqPS7YwFeBv Yb3uXrcAw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1if49T-0006lP-C2; Wed, 11 Dec 2019 15:43:47 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 82E5F3077F4; Wed, 11 Dec 2019 16:42:24 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E36CA20137C8F; Wed, 11 Dec 2019 16:43:44 +0100 (CET) Date: Wed, 11 Dec 2019 16:43:44 +0100 From: Peter Zijlstra To: Johannes Weiner Cc: Jingfeng Xie , Suren Baghdasaryan , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/2] psi: two division fixes Message-ID: <20191211154344.GP2827@hirez.programming.kicks-ass.net> References: <20191203183524.41378-1-hannes@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191203183524.41378-1-hannes@cmpxchg.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 03, 2019 at 01:35:22PM -0500, Johannes Weiner wrote: > Hi Peter, > > here is a patch that should fix the rare div0 crashes reported by > Jingfeng, and a second patch for a div32-with-64-bit-divisor issue > spotted during code review. > > Can you please take a look and route them through the scheduler tree? Will do, Thanks!