problem of kexec
Bhupesh Sharma
bhsharma at redhat.com
Thu Nov 23 02:22:25 PST 2017
Hello Zheng Ruoqin,
>> On Tue, Nov 7, 2017 at 9:41 AM, Pratyush Anand <pratyush.anand at gmail.com>
> wrote:
>>
>> Thanks for contacting. A bit busy..will look into all your log in weekend.
>> Meanwhile, have added Bhupesh, if he has some quick input.
>>
>>
>>
>> On Nov 7, 2017 8:58 AM, "Zheng, Ruoqin" <zhengrq.fnst at cn.fujitsu.com>
>> wrote:
>>
>> Hi pratyush：
>>
>> I am a member of Fujistu, and I want to run kexec in arm64, my arm board
>> is ls1046a(a Cortex-A72 soc based board).
>>
>>
>>
>> I have used kexec-tool v2.0.15 to start a new kernel, my test log is in
>> attachment. The kernel version is 4.9.35.
>>
>>
>>
>> 1. First, I boot the kernel in uboot with a itb file which includes Image
>> and dtb.
>>
>> Well, In my first boot, it works well.
>>
>> uboot command:
>>
>> =>setenv ipaddr 192.168.246.59; setenv serverip
>> 192.168.246.2; tftp a0000000 ....../ls1046/kernel-64le.itb
>>
>> =>setenv bootargs root=/dev/nfs rw
>> nfsroot=192.168.246.2:....../target_64le,vers=3 ip=dhcp rw
>> console=ttyS0,115200 earlycon=uart8250,mmio,0x21c0500;bootm
>> a0000000#ls1046a-edac
>>
>>
>>
>> 2. After the first kernel booted, I use kexec to boot the new kernel
>> with dtb file, the kernel is failed to allocate memory for node 'qman-fqd',
>> 'qman-pfdr' and 'bman-fbpr', then went Kernel panic. The log is in
>> “kexec-dtb-64le_kernel.log”.
>>
>>
>>
>> 3. And without dtb file, the kexec boot kernel will go farer and
>> print a lot of stack message, but finally, it can’t mount the NFS rootfs.
>> The log is in “kexec-without-dtb-64le_kernel.log”
>>
>>
>>
>> Can you give me some help about how to use kexec to start a new kernel
>> normally?
>>
Cc: linux-arm and kexec mailing lists for further inputs (Hoping some
NXP guys would see this and be able to help with the DPAA issue -
Q/BMAN issues you are seeing the crash boot logs)..
I had a look at the logs:
1. crashkernel logs with DTB being passed:
a. I am pasting the logs below again for reference -
root at ubinux-armv8:~# kexec -l ./Image --dtb="./fsl-ls1046a-rdb-sdk.dtb" --comman
d-line="$(cat /proc/cmdline)"
root at ubinux-armv8:~#
root at ubinux-armv8:~#
root at ubinux-armv8:~# kexec -e
[ 139.778840] kvm: exiting hardware virtualization
[ 139.785916] kexec_core: Starting new kernel
[ 139.790103] Disabling non-boot CPUs ...
2017 Nov 6 08:39:10 ubinux-armv8 [ 139.785916] kexec_core: Starting new kernel
[ 139.816312] IRQ53 no longer affine to CPU1
[ 139.820404] IRQ57 no longer affine to CPU1
[ 139.824496] IRQ61 no longer affine to CPU1
[ 139.828611] CPU1: shutdown
[ 139.831316] psci: CPU1 killed.
[ 139.880310] IRQ54 no longer affine to CPU2
[ 139.884405] IRQ58 no longer affine to CPU2
[ 139.888496] IRQ62 no longer affine to CPU2
[ 139.892682] CPU2: shutdown
[ 139.895386] psci: CPU2 killed.
[ 139.944268] IRQ55 no longer affine to CPU3
[ 139.948362] IRQ59 no longer affine to CPU3
[ 139.952453] IRQ63 no longer affine to CPU3
[ 139.956579] CPU3: shutdown
[ 139.959282] psci: CPU3 killed.
[ 139.983716] Bye!
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.9.35-g1e65b65 (zhengrq at force) (gcc version 5.4.0
20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) ) #1 SMP PREEMPT Tue Oct 24 14:1
1:03 JST 2017
[ 0.000000] Boot CPU: AArch64 Processor [410fd082]
[ 0.000000] earlycon: uart8250 at MMIO 0x00000000021c0500 (options '')
[ 0.000000] bootconsole [uart8250] enabled
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: UEFI not found.
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'qman-fqd'
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'qman-pfdr'
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'bman-fbpr'
[ 0.000000] cma: Failed to reserve 16 MiB
[ 0.000000] Kernel panic - not syncing: ERROR: Failed to allocate 0x1000 byte
s below 0x0.
[ 0.000000]
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.35-g1e65b65 #1
[ 0.000000] Hardware name: LS1046A RDB Board (DT)
[ 0.000000] Call trace:
[ 0.000000] [<ffff000008088498>] dump_backtrace+0x0/0x238
[ 0.000000] [<ffff0000080886e4>] show_stack+0x14/0x20
[ 0.000000] [<ffff0000084ec084>] dump_stack+0x9c/0xc0
[ 0.000000] [<ffff000008173a54>] panic+0x11c/0x284
[ 0.000000] [<ffff000009158158>] memblock_alloc_base+0x30/0x3c
[ 0.000000] [<ffff000009158174>] memblock_alloc+0x10/0x18
[ 0.000000] [<ffff000009146660>] early_pgtable_alloc+0x18/0x70
[ 0.000000] [<ffff000009146804>] paging_init+0x30/0x558
[ 0.000000] [<ffff000009143584>] setup_arch+0x19c/0x580
[ 0.000000] [<ffff000009140844>] start_kernel+0x70/0x390
[ 0.000000] [<ffff0000091401e0>] __primary_switched+0x64/0x6c
[ 0.000000] ---[ end Kernel panic - not syncing: ERROR: Failed to allocate 0x
1000 bytes below 0x0.
[ 0.000000]
[ 0.000000] Unable to handle kernel NULL pointer dereference at virtual addre
ss 00000000
[ 0.000000] pgd = ffff000009458000
[ 0.000000] [00000000] *pgd=0000000081459003[ 0.000000] Unable to handle k
ernel paging request at virtual address ffff800081459000
[ 0.000000] pgd = ffff000009458000
[ 0.000000] [ffff800081459000] *pgd=0000000000000000[ 0.000000]
[ 0.000000] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.35-g1e65b65 #1
[ 0.000000] Hardware name: LS1046A RDB Board (DT)
[ 0.000000] task: ffff0000092744c0 task.stack: ffff000009260000
[ 0.000000] PC is at show_pte+0xa0/0x118
[ 0.000000] LR is at show_pte+0x48/0x118
[ 0.000000] pc : [<ffff000008097430>] lr : [<ffff0000080973d8>] pstate: 60000
1c5
[ 0.000000] sp : ffff000009213d80
[ 0.000000] x29: ffff000009213d80 x28: ffff0000092744c0
[ 0.000000] x27: ffff000008c82000 x26: ffff000009214050
[ 0.000000] x25: ffff000009210060 x24: 0000000000000021
[ 0.000000] x23: 0000000086000004 x22: 0000000000000000
[ 0.000000] x21: 0000000000000000 x20: ffff0000090a8000
[ 0.000000] x19: ffff800081459000 x18: 0000000000000010
[ 0.000000] x17: ffff000009394c18 x16: 0000000000000000
[ 0.000000] x15: ffff00008936af9f x14: 0000000000000006
[ 0.000000] x13: ffff00000936afad x12: 000000000000000f
[ 0.000000] x11: 0000000000000006 x10: 000000000000001d
[ 0.000000] x9 : ffff000009213b90 x8 : 3330303935343138
[ 0.000000] x7 : 3030303030303030 x6 : ffff00000936afcf
[ 0.000000] x5 : ffff000009304d68 x4 : 0000000000000000
[ 0.000000] x3 : 0000000000000000 x2 : 0000000000000000
[ 0.000000] x1 : 0000000081459000 x0 : ffff000008fafcc0
[ 0.000000]
[ 0.000000] Process swapper (pid: 0, stack limit = 0xffff000009260000)
[ 0.000000] Stack: (0xffff000009213d80 to 0xffff000009264000)
[ 0.000000] 3d80: ffff000009213db0 ffff00000809a154 0000000000000000 ffff0000
09213f10
[ 0.000000] 3da0: 0000000086000004 696e6170206c656e ffff000009213de0 ffff0000
080978e4
b. I would suggest to use the following command line to load the
crashkernel rather than using the '-dtb' option to laod the
crashkernel:
# kexec -l <path to Image or vmlinuz> --initrd=<path to initramfs>
--reuse-cmdline
for e.g. assuming the images are installed inside /boot, use:
# kexec -l /boot/vmlinuz-`uname -r` --initrd=/boot/initramfs-`uname
-r`.img --reuse-cmdline
c. And then use:
# kexec -e
2. The following logs show that the memory allocation for the Q/BMAN
nodes for the DPAA hardware network accelerator (as mentioned in the
DTB) failed:
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'qman-fqd'
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'qman-pfdr'
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'bman-fbpr'
[ 0.000000] cma: Failed to reserve 16 MiB
3. Also can you please share the output of the following commands on
the primary kernel boot:
# cat /sys/kernel/kexec_crash_size
# cat /proc/iomem
Regards,
Bhupesh
>>
>> --------------------------------------------------
>>
>> Zheng Ruoqin
>>
>> Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
>>
>> ADDR.: No.6 Wenzhu Road, Software Avenue,
>>
>> Nanjing, 210012, China
>>
>> MAIL : zhengrq.fnst at cn.fujistu.com
>>
>>
>>
>>
>
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