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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 03149C43334 for ; Wed, 1 Jun 2022 17:58:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Icfv4DitS7WC98JlpZMUxg2smnngGY90xueohgsuiLM=; b=ES20POvquzvPoS 0ETEutPdqmn0YaO3EVJdhs8OJXiXd/S7qtNtz3WVGZIv7q0pObugQRXituJvbxHhmbgo3POgWByNv PxzkWnYzJEGOkJB6C1DTnIaRbQVdqR8YmboLY+OZN4qBScqZUzXP+udU1vzEW6GkNpcaRs67Zly6x v4+lZMrZeXum3YK7pT5uyr5ZAu5vJJeoHOx35NSlPYklfVET+CZioVXA+ulBDUIvEe8LPJ/iFtrZ7 LiSUpyQz3O0VsmUanulXoSQZ4pgpPLLAt6akJqLNc4228/E0pZ5EpGCCvNKMxGm//FJDjAyG5yKZg LfoerQa6FnhjYw4Ub7vw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nwSbS-00HPO5-PP; Wed, 01 Jun 2022 17:57:54 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nwSbQ-00HPKK-9u; Wed, 01 Jun 2022 17:57:53 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id D34A568C4E; Wed, 1 Jun 2022 19:57:44 +0200 (CEST) Date: Wed, 1 Jun 2022 19:57:43 +0200 From: Christoph Hellwig To: Nathan Chancellor Cc: Christoph Hellwig , iommu@lists.linux-foundation.org, x86@kernel.org, Anshuman Khandual , Tom Lendacky , Konrad Rzeszutek Wilk , Stefano Stabellini , Boris Ostrovsky , Juergen Gross , Joerg Roedel , David Woodhouse , Lu Baolu , Robin Murphy , linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org Subject: Re: [PATCH 09/15] swiotlb: make the swiotlb_init interface more useful Message-ID: <20220601175743.GA28082@lst.de> References: <20220404050559.132378-1-hch@lst.de> <20220404050559.132378-10-hch@lst.de> <20220601173441.GB27582@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220601_105752_536048_061F2A00 X-CRM114-Status: GOOD ( 17.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jun 01, 2022 at 10:46:54AM -0700, Nathan Chancellor wrote: > On Wed, Jun 01, 2022 at 07:34:41PM +0200, Christoph Hellwig wrote: > > Can you send me the full dmesg and the content of > > /sys/kernel/debug/swiotlb/io_tlb_nslabs for a good and a bad boot? > > Sure thing, they are attached! If there is anything else I can provide > or test, I am more than happy to do so. Nothing interesting. But the performance numbers almost look like swiotlb=force got ignored before (even if I can't explain why). Do you get a similar performance with the new kernel without swiotlb=force as the old one with that argument by any chance? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel