On Tue, Nov 21, 2017 at 04:39:14PM +0200, Andy Shevchenko wrote:
On Tue, 2017-11-21 at 21:31 +0800, Fengguang Wu wrote:
On Tue, Nov 21, 2017 at 08:33:57PM +0800, Fengguang Wu wrote:
> Hello,
>
> FYI this happens in mainline kernel 4.14.0-02748-gabc36be.
> It shows up since v4.13 .
Sorry it actually also shows up in 4.10:
This one means that interrupt storm is occurred. Last time I saw that
was by the fact of some specific IOAPIC configuration when DMA for UART
was enabled.
I'm pretty sure that is not the case here. Though, it would be nice to
see link to the following files:
It's basically a KVM machine. This is adapted from the reproduce
script attached in the first email:
kvm=(
qemu-system-x86_64
-enable-kvm
-cpu IvyBridge
-kernel $kernel
-initrd initrd.img
-m 1536
-smp 2
-device e1000,netdev=net0
-netdev user,id=net0,hostfwd=tcp::23406-:22
-boot order=nc
-no-reboot
-watchdog i6300esb
-watchdog-action debug
-rtc base=localtime
-drive file=disk-vm-ivb41-1G-7-0,media=disk,if=virtio
-drive file=disk-vm-ivb41-1G-7-1,media=disk,if=virtio
-drive file=disk-vm-ivb41-1G-7-2,media=disk,if=virtio
-drive file=disk-vm-ivb41-1G-7-3,media=disk,if=virtio
-drive file=disk-vm-ivb41-1G-7-4,media=disk,if=virtio
-drive file=disk-vm-ivb41-1G-7-5,media=disk,if=virtio
-serial stdio
-display none
-monitor null
)
append=(
ip=::::vm-ivb41-1G-7::dhcp
root=/dev/ram0
user=lkp
job=/job-script
ARCH=x86_64
kconfig=x86_64-allyesdebian
branch=linus/master
commit=abc36be236358162202e86ad88616ff95a755101
BOOT_IMAGE=/pkg/linux/x86_64-allyesdebian/gcc-6/abc36be236358162202e86ad88616ff95a755101/vmlinuz-4.14.0-02748-gabc36be
max_uptime=600
RESULT_ROOT=/result/boot/1/vm-ivb41-1G/debian-x86_64-2016-08-31.cgz/x86_64-allyesdebian/gcc-6/abc36be236358162202e86ad88616ff95a755101/0
result_service=tmpfs
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
printk.devkmsg=on
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
drbd.minor_count=8
systemd.log_level=err
ignore_loglevel
console=tty0
earlyprintk=ttyS0,115200
console=ttyS0,115200
vga=normal
rw
)
Thanks,
Fengguang
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
