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dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:33106 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKfMw-000633-FE for qemu-devel@archiver.kernel.org; Tue, 22 Sep 2020 06:17:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50540) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKfMG-0005aB-It for qemu-devel@nongnu.org; Tue, 22 Sep 2020 06:17:12 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:32356) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kKfME-0004TR-Id for qemu-devel@nongnu.org; Tue, 22 Sep 2020 06:17:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600769829; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZSocmPHYqjEda5mFL2M3W+XcIJKAiTKuDLlDJf3zPUQ=; b=a4RZi4W71jCt9kGOzQvFBIUY+itq301hvs20311YfNU97Z8vUjs7pVmq4v/4rvHpZUtyRi mmnQmAF6mE5Rjr6G2pkZ/W+6o1pPo50BodMOXCykeUCukAdxE2D7GRwCqzkguVj8HPpQqf tAMARHLXwNRg2uW0hpai8aC/b2iiJ9g= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-151-M3UaLETcNgSPFmAbIN35Rg-1; Tue, 22 Sep 2020 06:17:08 -0400 X-MC-Unique: M3UaLETcNgSPFmAbIN35Rg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7C8491868410; Tue, 22 Sep 2020 10:17:05 +0000 (UTC) Received: from gondolin (ovpn-112-114.ams2.redhat.com [10.36.112.114]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1E5305DE19; Tue, 22 Sep 2020 10:16:52 +0000 (UTC) Date: Tue, 22 Sep 2020 12:16:50 +0200 From: Cornelia Huck To: Matthew Rosato Subject: Re: [PATCH v4 5/5] s390x/pci: Honor DMA limits set by vfio Message-ID: <20200922121650.1bdd0ea6.cohuck@redhat.com> In-Reply-To: <1600352445-21110-6-git-send-email-mjrosato@linux.ibm.com> References: <1600352445-21110-1-git-send-email-mjrosato@linux.ibm.com> <1600352445-21110-6-git-send-email-mjrosato@linux.ibm.com> Organization: Red Hat GmbH MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Received-SPF: pass client-ip=216.205.24.124; envelope-from=cohuck@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 00:31:51 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.455, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, kvm@vger.kernel.org, pmorel@linux.ibm.com, david@redhat.com, schnelle@linux.ibm.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org, pasic@linux.ibm.com, borntraeger@de.ibm.com, alex.williamson@redhat.com, mst@redhat.com, pbonzini@redhat.com, philmd@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, 17 Sep 2020 10:20:45 -0400 Matthew Rosato wrote: > When an s390 guest is using lazy unmapping, it can result in a very > large number of oustanding DMA requests, far beyond the default > limit configured for vfio. Let's track DMA usage similar to vfio > in the host, and trigger the guest to flush their DMA mappings > before vfio runs out. > > Signed-off-by: Matthew Rosato > --- > hw/s390x/s390-pci-bus.c | 16 +++++++++++----- > hw/s390x/s390-pci-bus.h | 9 +++++++++ > hw/s390x/s390-pci-inst.c | 45 +++++++++++++++++++++++++++++++++++++++------ > hw/s390x/s390-pci-inst.h | 3 +++ > hw/s390x/s390-pci-vfio.c | 42 ++++++++++++++++++++++++++++++++++++++++++ > hw/s390x/s390-pci-vfio.h | 5 +++++ > 6 files changed, 109 insertions(+), 11 deletions(-) Reviewed-by: Cornelia Huck