Messages in this thread | | | Date | Thu, 8 Sep 2016 09:43:13 +0800 | From | Fengguang Wu <> | Subject | Re: [LKP] [writeback] 8bc4ad9498: INFO: suspicious RCU usage. ] |
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Hi Jens and Tejun,
>The command line was in the original email: > >$ qemu-system-x86_64 -enable-kvm -cpu Westmere -m 512M > >And agree, in general it'd be nice if there was a link to the image as >well, so that folks can reproduce.
Yes we have a reproduce script internally, however need to polish it up and make it general usable by kernel developers.
CC Philip. It'd be helpful to give more priority to the "lkp qemu" reproduce command.
For the warning here, it does not depend on any initrd, I just confirmed this simple script can reproduce the problem.
----------------------------------------------------------------------------- #!/bin/bash
kernel=$1
kvm=( qemu-system-x86_64 -enable-kvm -cpu Westmere -kernel $kernel -m 1024 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -watchdog-action debug -rtc base=localtime -nographic )
append=( ip=::::vm-kbuild-yocto-ia32-17::dhcp root=/dev/ram0 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 systemd.log_level=err ignore_loglevel earlyprintk=ttyS0,115200 console=ttyS0,115200 console=tty0 vga=normal rw )
"${kvm[@]}" -append "${append[*]}" -----------------------------------------------------------------------------
Thanks, Fengguang
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