Messages in this thread | | | Date | Thu, 8 Sep 2016 10:04:04 +0800 | From | Ye Xiaolong <> | Subject | Re: [LKP] [writeback] 8bc4ad9498: INFO: suspicious RCU usage. ] |
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On 09/08, Fengguang Wu wrote: >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.
Yes, just confirmed that v4.8-rc5 doesn't have this warning, while kernel for the updated commit (fa0e2cb1af765691fabd329f03cad563a0eebf18) on branch wb-buf-throttle could reproduce it.
Thanks, Xiaolong > >----------------------------------------------------------------------------- >#!/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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