Re: [Xen-devel] xen-unstable + 4.1.0-rc1: Dom0 kernel stalls in early boot

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Monday, April 27, 2015, 4:55:06 PM, you wrote:

> Hi David / Konrad,

> Today i tried upgrading my dom0 kernel to 4.1-rc1, but it stalls in early 
> boot.
> Xen console was still reponsive so i dumped some info with the debug keys.

> Serial log is attached.

> The kernel boots fine on baremetal and my previous test kernel that was 
> pulled 
> and compiled on 20150423 in the mergewindow boots fine (unfortunately my 
> scripts
> don't add an git commit version to the kernel name yet.

> (but the 20150423 version has it's own issue when used as a PV guest kernel 
> with pci passthrough, pci-front can't connect somehow, which i was trying 
> to get at .. when i stumbled upon this one :-) ).

> --
> Sander

Hmm and to add to that .. the 4.1-rc1 also doesn't work in other PV guests 
(under the  20150423 mergewindow kernel as dom)), from a PV guest console it 
hangs at:

[    0.000000] PAT configuration [0-7]: WB  WT  UC- UC  WC  WP  UC  UC
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 4.1.0-rc1-20150427+ (root@serveerstertje) (gcc 
version 4.7.2 (Debian 4.7.2-5) ) #1 SMP Mon Apr 27 15:05:57 CEST 2015
[    0.000000] Command line: root=/dev/xvda1 ro
[    0.000000] ACPI in unprivileged domain disabled
[    0.000000] Released 0 page(s)
[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[    0.000000] Xen: [mem 0x0000000000100000-0x000000000fffffff] usable
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] MPS support code is not built-in.
[    0.000000] Using acpi=off or acpi=noirq or pci=noacpi may have problem
[    0.000000] DMI not present or invalid.
[    0.000000] AGP: No AGP bridge found
[    0.000000] e820: last_pfn = 0x10000 max_arch_pfn = 0x400000000
[    0.000000] Scanning 1 areas for low memory corruption
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000] init_memory_mapping: [mem 0x0fe00000-0x0fffffff]
[    0.000000] init_memory_mapping: [mem 0x00100000-0x0fdfffff]
[    0.000000] RAMDISK: [mem 0x02561000-0x03896fff]
[    0.000000] NUMA turned off
[    0.000000] Faking a node at [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000] NODE_DATA(0) allocated [mem 0x0ff94000-0x0ff9efff]
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.000000]   DMA32    [mem 0x0000000001000000-0x000000000fffffff]
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000001000-0x000000000009ffff]
[    0.000000]   node   0: [mem 0x0000000000100000-0x000000000fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x000000000fffffff]
[    0.000000] p2m virtual area at ffffc90000000000, size is 200000
[    0.000000] Remapped 0 page(s)
[    0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[    0.000000] No local APIC present
[    0.000000] APIC: disable apic facility
[    0.000000] APIC: switched to apic NOOP
[    0.000000] e820: [mem 0x10000000-0xffffffff] available for PCI devices
[    0.000000] Booting paravirtualized kernel on Xen
[    0.000000] Xen version: 4.6-unstable (preserve-AD)
[    0.000000] clocksource refined-jiffies: mask: 0xffffffff max_cycles: 
0xffffffff, max_idle_ns: 6370452778343963 ns
[    0.000000] setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:1 
nr_node_ids:1
[    0.000000] PERCPU: Embedded 32 pages/cpu @ffff88000fc00000 s93864 r8192 
d29016 u2097152
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total 
pages: 64394
[    0.000000] Policy zone: DMA32
[    0.000000] Kernel command line: root=/dev/xvda1 ro
[    0.000000] PID hash table entries: 1024 (order: 1, 8192 bytes)
[    0.000000] AGP: Checking aperture...
[    0.000000] AGP: No AGP bridge found
[    0.000000] Memory: 214836K/261756K available (11958K kernel code, 987K 
rwdata, 4520K rodata, 1108K init, 1164K bss, 46920K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  RCU dyntick-idle grace-period acceleration is enabled.
[    0.000000]  Additional per-CPU info printed with stalls.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[    0.000000] NR_IRQS:4352 nr_irqs:32 16
[    0.000000] xen:events: Using FIFO-based ABI
[    0.000000] Console: colour dummy device 80x25
[    0.000000] console [tty0] enabled
[    0.000000] console [hvc0] enabled
[    0.000000] kmemleak: Kernel memory leak detector disabled
[    0.000000] clocksource xen: mask: 0xffffffffffffffff max_cycles: 
0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.000000] installing Xen timer for CPU 0
[    0.000000] tsc: Detected 3200.182 MHz processor
[    0.003333] Calibrating delay loop (skipped), value calculated using timer 
frequency.. 6402.04 BogoMIPS (lpj=10667273)
[    0.003333] pid_max: default: 32768 minimum: 301
[    0.003333] Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
[    0.003333] Inode-cache hash table entries: 16384 (order: 5, 131072 bytes)
[    0.003333] Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
[    0.003333] Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes)
[    0.003333] Initializing cgroup subsys blkio
[    0.003333] Initializing cgroup subsys freezer
[    0.003333] CPU: Physical Processor ID: 0
[    0.003333] CPU: Processor Core ID: 1
[    0.003333] Last level iTLB entries: 4KB 512, 2MB 16, 4MB 8
[    0.003333] Last level dTLB entries: 4KB 512, 2MB 128, 4MB 64, 1GB 0
[    0.046145] Freeing SMP alternatives memory: 40K (ffffffff8240d000 - 
ffffffff82417000)


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