On Thu, 2023-06-08 at 19:39 +0000, [email protected] wrote:
> From: Bruce Ashfield <[email protected]>
> 
> We are seeing intermittent boot hangs with x86. Once of the last
> messages in failing logs is secondary cpu startup.
> 
> Dropping us down to smp for testing to see if the hangs start to
> go away with smp removed.
> 
> Signed-off-by: Bruce Ashfield <[email protected]>
> ---
>  meta/conf/machine/include/x86/qemuboot-x86.inc | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/meta/conf/machine/include/x86/qemuboot-x86.inc 
> b/meta/conf/machine/include/x86/qemuboot-x86.inc
> index 6ae03633ae..54a12119a7 100644
> --- a/meta/conf/machine/include/x86/qemuboot-x86.inc
> +++ b/meta/conf/machine/include/x86/qemuboot-x86.inc
> @@ -1,6 +1,6 @@
>  # For runqemu
>  IMAGE_CLASSES += "qemuboot"
> -QB_SMP ?= "-smp 4"
> +QB_SMP ?= ""
>  QB_CPU:x86 ?= "-cpu IvyBridge -machine q35,i8042=off"
>  QB_CPU_KVM:x86 ?= "-cpu IvyBridge -machine q35,i8042=off"
> 
> 

FWIW, this patch didn't change much. With it applied we still see:

https://autobuilder.yoctoproject.org/typhoon/#/builders/81/builds/5168/steps/12/logs/stdio

[    0.634735] Freeing SMP alternatives memory: 52K
[   12.275510] smpboot: CPU0: Intel Xeon E3-12xx v2 (Ivy Bridge) (family: 0x6, 
model: 0x3a, stepping: 0x9)
[274491.955544] cblist_init_generic: Setting adjustable number of callback 
queues.
[274492.008510] cblist_init_generic: Setting shift to 0 and lim to 1.
[279820.791509] cblist_init_generic: Setting shift to 0 and lim to 1.
[282104.735510] cblist_init_generic: Setting shift to 0 and lim to 1.
[386831.154510] Performance Events: unsupported p6 CPU model 58 no PMU driver, 
software events only.
[386850.632510] rcu: Hierarchical SRCU implementation.
[386850.668510] rcu:    Max phase no-delay instances is 400.
[386852.898509] smp: Bringing up secondary CPUs ...
[386852.946510] smp: Brought up 1 node, 1 CPU
[386852.992510] smpboot: Max logical packages: 1
[386853.018509] smpboot: Total of 1 processors activated (5199.99 BogoMIPS)
[386855.257509] devtmpfs: initialized
[386857.982509] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, 
max_idle_ns: 1911260446275000 ns
[386858.041510] futex hash table entries: 256 (order: 2, 16384 bytes, linear)
[386858.691509] pinctrl core: initialized pinctrl subsystem
[386862.836510] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[386864.720510] thermal_sys: Registered thermal governor 'step_wise'
[386864.725509] thermal_sys: Registered thermal governor 'user_space'
[386864.864510] cpuidle: using governor menu
[386865.662509] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 
0xb0000000-0xbfffffff] (base 0xb0000000)
[386865.693510] PCI: MMCONFIG at [mem 0xb0000000-0xbfffffff] reserved in E820
[386865.900509] PCI: Using configuration type 1 for base access
[386878.550509] kprobes: kprobe jump-optimization is enabled. All kprobes are 
optimized if possible.

Cheers,

Richard

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