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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 245C7C2D0A3 for ; Tue, 10 Nov 2020 03:25:50 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7483420721 for ; Tue, 10 Nov 2020 03:25:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7483420721 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34852 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kcKI0-0000Oo-Ea for qemu-devel@archiver.kernel.org; Mon, 09 Nov 2020 22:25:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:41080) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kcKDF-0002DM-HF for qemu-devel@nongnu.org; Mon, 09 Nov 2020 22:20:53 -0500 Received: from indium.canonical.com ([91.189.90.7]:51672) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kcKDD-0004TG-A6 for qemu-devel@nongnu.org; Mon, 09 Nov 2020 22:20:53 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1kcKDB-0004qO-SI for ; Tue, 10 Nov 2020 03:20:49 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id D474C2E8134 for ; Tue, 10 Nov 2020 03:20:49 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Tue, 10 Nov 2020 03:05:13 -0000 From: Thomas Huth <1719339@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Incomplete; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: canonical-is X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: dzagorui paulgear th-huth X-Launchpad-Bug-Reporter: Denys Zagorui (dzagorui) X-Launchpad-Bug-Modifier: Thomas Huth (th-huth) References: <150635197143.30872.17188090859541401647.malonedeb@wampee.canonical.com> Message-Id: <160497751310.13225.9634150119675362893.malone@gac.canonical.com> Subject: [Bug 1719339] Re: serial8250: too much work for irq3 X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="e39939c02bd86af4202bc6e2123a7708215ec8ea"; Instance="production" X-Launchpad-Hash: c85e79c23baf5f466b68b12cbe29800b8bf7b807 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/09 20:35:34 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1719339 <1719339@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The QEMU project is currently considering to move its bug tracking to anoth= er system. For this we need to know which bugs are still valid and which co= uld be closed already. Thus we are setting older bugs to "Incomplete" now. If you still think this bug report here is valid, then please switch the st= ate back to "New" within the next 60 days, otherwise this report will be ma= rked as "Expired". Or mark it as "Fix Released" if the problem has been sol= ved with a newer version of QEMU already. Thank you and sorry for the incon= venience. ** Changed in: qemu Status: New =3D> Incomplete -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1719339 Title: serial8250: too much work for irq3 Status in QEMU: Incomplete Bug description: It's know issue and sometimes mentioned since 2007. But it seems not fixed. http://lists.gnu.org/archive/html/qemu-devel/2008-02/msg00140.html https://bugzilla.redhat.com/show_bug.cgi?id=3D986761 http://old-list-archives.xenproject.org/archives/html/xen-devel/2009-02/m= sg00696.html I don't think fixes like increases PASS_LIMIT (/drivers/tty/serial/8250.c) or remove this annoying message (https://patchwork.kernel.org/patch/3920801/) is real fix. Some fix was proposed by H. Peter Anvin https://lkml.org/lkml/2008/2/7/485. Can reproduce on Debian Strech host (Qemu 1:2.8+dfsg-6+deb9u2), Ubuntu 16.04.2 LTS (Qemu 1:2.5+dfsg-5ubuntu10.15) also tried to use master branch (QEMU emulator version 2.10.50 (v2.10.0-766-ga43415ebfd-dirty)) if we write a lot of message into console (dmesg or dd if=3D/dev/zero of=3D/dev/ttyS1). /usr/local/bin/qemu-system-x86_64 -name guest=3Dultra1,debug-threads=3Don -S -object secret,id=3DmasterKey0,format=3Draw,file=3D/var/lib/libvirt/qemu/domain-2= 7-ultra1 /master-key.aes -machine pc-i440fx-2.8,accel=3Dkvm,usb=3Doff,dump-guest- core=3Doff -cpu Skylake- Client,ds=3Don,acpi=3Don,ss=3Don,ht=3Don,tm=3Don,pbe=3Don,dtes64=3Don,mon= itor=3Don,ds_cpl=3Don,vmx=3Don,smx=3Don,est=3Don,tm2=3Don,xtpr=3Don,pdcm=3D= on,osxsave=3Don,tsc_adjust=3Don,clflushopt=3Don,pdpe1gb=3Don -m 4096 -realtime mlock=3Doff -smp 4,sockets=3D1,cores=3D4,threads=3D1 -u= uid 4537ca29-73b2-40c3-9b43-666de182ba5f -display none -no-user-config -nodefaults -chardev socket,id=3Dcharmonitor,path=3D/var/lib/libvirt/qemu/domain-27-ultra1/mon= itor.sock,server,nowait -mon chardev=3Dcharmonitor,id=3Dmonitor,mode=3Dcontrol -rtc base=3Dutc,driftfix=3Dslew -global kvm-pit.lost_tick_policy=3Ddelay -no-h= pet -no-shutdown -global PIIX4_PM.disable_s3=3D1 -global PIIX4_PM.disable_s4=3D1 -boot strict=3Don -device ich9-usb- ehci1,id=3Dusb,bus=3Dpci.0,addr=3D0x8.0x7 -drive file=3D/home/dzagorui/csr/csr_disk.qcow2,format=3Dqcow2,if=3Dnone,id=3Ddr= ive- ide0-0-0 -device ide-hd,bus=3Dide.0,unit=3D0,drive=3Ddrive- ide0-0-0,id=3Dide0-0-0,bootindex=3D1 -netdev tap,fd=3D26,id=3Dhostnet0 -d= evice e1000,netdev=3Dhostnet0,id=3Dnet0,mac=3D52:54:00:a9:4c:86,bus=3Dpci.0,add= r=3D0x3 -chardev socket,id=3Dcharserial0,host=3D127.0.0.1,port=3D4000,telnet,server,nowait -device isa-serial,chardev=3Dcharserial0,id=3Dserial0 -chardev socket,id=3Dcharserial1,host=3D127.0.0.1,port=3D4001,telnet,server,nowait -device isa-serial,chardev=3Dcharserial1,id=3Dserial1 -device virtio- balloon-pci,id=3Dballoon0,bus=3Dpci.0,addr=3D0x2 -msg timestamp=3Don To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1719339/+subscriptions