linux-kernel - Re: [LKP] [lkp] [spi] 2baed30cb3: BUG: scheduling while atomic: systemd-udevd/134/0x00000002

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Date:	Thu, 21 Jan 2016 13:47:10 +0800
From:	"Huang\, Ying" <ying.huang@...el.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	"Huang\, Ying" <ying.huang@...el.com>,
	Sudip Mukherjee <sudip@...torindia.org>,
	Mark Brown <broonie@...nel.org>, <lkp@...org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [LKP] [lkp] [spi] 2baed30cb3: BUG: scheduling while atomic: systemd-udevd/134/0x00000002

Sudip Mukherjee <sudipm.mukherjee@...il.com> writes:

> On Wed, Jan 20, 2016 at 01:00:40PM +0800, Huang, Ying wrote:
>> Sudip Mukherjee <sudipm.mukherjee@...il.com> writes:
>> 
>> > On Wed, Jan 20, 2016 at 08:44:37AM +0800, kernel test robot wrote:
>> >> FYI, we noticed the below changes on
>> >> 
>> >> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> >> commit 2baed30cb30727b2637d26eac5a8887875a13420 ("spi: lm70llp: use new parport device model")
>> >> 
>> >> 
>> >> +----------------+------------+------------+
>> >> |                | 74bdced4b4 | 2baed30cb3 |
>> >> +----------------+------------+------------+
>> >> | boot_successes | 0          | 0          |
>> >> +----------------+------------+------------+
>> >> 
>> >> 
>> >> 
>> >> [    6.358390] i6300esb: Intel 6300ESB WatchDog Timer Driver v0.05
>> >> [    6.358540] i6300esb: cannot register miscdev on minor=130 (err=-16)
>> >> [    6.358555] i6300ESB timer: probe of 0000:00:06.0 failed with error -16
>> >> [    6.363357] BUG: scheduling while atomic: systemd-udevd/134/0x00000002
>> >> [ 6.363366] Modules linked in: crc32c_intel pcspkr evdev i6300esb
>> >> ide_cd_mod cdrom intel_agp intel_gtt i2c_piix4 i2c_core virtio_pci
>> >> virtio virtio_ring agpgart rtc_cmos(+) parport_pc(+) autofs4
>> >> [    6.363369] CPU: 1 PID: 134 Comm: systemd-udevd Not tainted 4.4.0-rc1-00006-g2baed30 #1
>> >> [    6.363370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
>> >
>> > Can you please let me know how do i reproduce this on qemu? what command
>> > line you used?
>> 
>> The command line can be found in the last line of dmesg file, as below.
>> 
>> qemu-system-x86_64 -enable-kvm -cpu host -kernel
>> /pkg/linux/x86_64-randconfig-a0-01191454/gcc-5/2baed30cb30727b2637d26eac5a8887875a13420/vmlinuz-4.4.0-rc1-00006-g2baed30
>> -append 'root=/dev/ram0 user=lkp
>> job=/lkp/scheduled/vm-lkp-wsx03-2G-2/bisect_boot-1-debian-x86_64-2015-02-07.cgz-x86_64-randconfig-a0-01191454-2baed30cb30727b2637d26eac5a8887875a13420-20160119-71002-198dtgm-0.yaml
>> ARCH=x86_64 kconfig=x86_64-randconfig-a0-01191454
>> branch=linux-devel/devel-spot-201601191442
>> commit=2baed30cb30727b2637d26eac5a8887875a13420
>> BOOT_IMAGE=/pkg/linux/x86_64-randconfig-a0-01191454/gcc-5/2baed30cb30727b2637d26eac5a8887875a13420/vmlinuz-4.4.0-rc1-00006-g2baed30
>> max_uptime=600
>> RESULT_ROOT=/result/boot/1/vm-lkp-wsx03-2G/debian-x86_64-2015-02-07.cgz/x86_64-randconfig-a0-01191454/gcc-5/2baed30cb30727b2637d26eac5a8887875a13420/0
>> LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug
>> apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100
>> panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic
>> load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0
>> vga=normal rw ip=::::vm-lkp-wsx03-2G-2::dhcp' -initrd
>> /fs/sda1/initrd-vm-lkp-wsx03-2G-2 -m 2048 -smp 2 -device
>> e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::23621-:22 -boot
>> order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive
>> file=/fs/sda1/disk0-vm-lkp-wsx03-2G-2,media=disk,if=virtio -drive
>> file=/fs/sda1/disk1-vm-lkp-wsx03-2G-2,media=disk,if=virtio -pidfile
>> /dev/shm/kboot/pid-vm-lkp-wsx03-2G-2 -serial
>> file:/dev/shm/kboot/serial-vm-lkp-wsx03-2G-2 -daemonize -display
>> none -monitor null
>
> I am not able to reproduce this. Tested just with the kernel and
> yocto-minimal-i386.cgz filesystem and it booted properly.
>
> I guess I need atleast your job file to reproduce this.

This is a boot test so I did not attached the job file.  But the test
result may depends on specific root file system.  For example, the
process when BUG report is always systemd-udevd.  Maybe you need a
systemd based root file system.

Best Regards,
Huang, Ying