From: Launchpad Bug Tracker <1719339@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1719339] Re: serial8250: too much work for irq3
Date: Sat, 09 Jan 2021 04:17:54 -0000 [thread overview]
Message-ID: <161016587444.8490.12590899584383488530.malone@loganberry.canonical.com> (raw)
In-Reply-To: 150635197143.30872.17188090859541401647.malonedeb@wampee.canonical.com
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
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:
Expired
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=986761
http://old-list-archives.xenproject.org/archives/html/xen-devel/2009-02/msg00696.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=/dev/zero
of=/dev/ttyS1).
/usr/local/bin/qemu-system-x86_64 -name guest=ultra1,debug-threads=on
-S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-27-ultra1
/master-key.aes -machine pc-i440fx-2.8,accel=kvm,usb=off,dump-guest-
core=off -cpu Skylake-
Client,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds_cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,osxsave=on,tsc_adjust=on,clflushopt=on,pdpe1gb=on
-m 4096 -realtime mlock=off -smp 4,sockets=1,cores=4,threads=1 -uuid
4537ca29-73b2-40c3-9b43-666de182ba5f -display none -no-user-config
-nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-27-ultra1/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet
-no-shutdown -global PIIX4_PM.disable_s3=1 -global
PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-
ehci1,id=usb,bus=pci.0,addr=0x8.0x7 -drive
file=/home/dzagorui/csr/csr_disk.qcow2,format=qcow2,if=none,id=drive-
ide0-0-0 -device ide-hd,bus=ide.0,unit=0,drive=drive-
ide0-0-0,id=ide0-0-0,bootindex=1 -netdev tap,fd=26,id=hostnet0 -device
e1000,netdev=hostnet0,id=net0,mac=52:54:00:a9:4c:86,bus=pci.0,addr=0x3
-chardev
socket,id=charserial0,host=127.0.0.1,port=4000,telnet,server,nowait
-device isa-serial,chardev=charserial0,id=serial0 -chardev
socket,id=charserial1,host=127.0.0.1,port=4001,telnet,server,nowait
-device isa-serial,chardev=charserial1,id=serial1 -device virtio-
balloon-pci,id=balloon0,bus=pci.0,addr=0x2 -msg timestamp=on
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1719339/+subscriptions
prev parent reply other threads:[~2021-01-09 4:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-25 15:06 [Qemu-devel] [Bug 1719339] [NEW] serial8250: too much work for irq3 Denys Zagorui
2017-09-27 13:33 ` [Qemu-devel] [Bug 1719339] " Denys Zagorui
2017-10-18 12:45 ` Denys Zagorui
2017-11-01 10:32 ` Denys Zagorui
2018-03-05 14:14 ` Denys Zagorui
2018-07-11 1:53 ` Paul Gear
2018-07-11 3:22 ` Paul Gear
2018-07-11 7:12 ` Paul Gear
2018-07-12 1:00 ` Paul Gear
2020-11-10 3:05 ` Thomas Huth
2021-01-09 4:17 ` Launchpad Bug Tracker [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=161016587444.8490.12590899584383488530.malone@loganberry.canonical.com \
--to=1719339@bugs.launchpad.net \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.