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From: PGNet Dev <pgnet.dev@gmail.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: xen-devel@lists.xen.org
Subject: Re: Xen 4.6 --with-ovmf, on UEFI Dom0 host up/running, but logging repeated "d1v0 Over-allocation for domain" ?
Date: Fri, 18 Mar 2016 09:19:48 -0700	[thread overview]
Message-ID: <5a088a12-a87d-e8f7-b400-3c0ddbef2709@gmail.com> (raw)
In-Reply-To: <20160318160322.GJ28955@citrix.com>

> In Dom0:
>
>   xenstore-ls -f /local/domain/$guest_domid
>
> and paste it here.

xl list
Name                                        ID   Mem VCPUs      State 
Time(s)
	Domain-0                                     0  4096     1     r----- 
   111.3
	test-template                                1  2049     1     -b---- 
   106.3
xenstore-ls -f /local/domain/1
	/local/domain/1/vm = "/vm/7088e288-a0ba-4848-80e6-19a05f1772a2"
	/local/domain/1/name = "test-template"
	/local/domain/1/cpu = ""
	/local/domain/1/cpu/0 = ""
	/local/domain/1/cpu/0/availability = "online"
	/local/domain/1/memory = ""
	/local/domain/1/memory/static-max = "2097152"
	/local/domain/1/memory/target = "2080768"
	/local/domain/1/memory/videoram = "16384"
	/local/domain/1/device = ""
	/local/domain/1/device/suspend = ""
	/local/domain/1/device/suspend/event-channel = ""
	/local/domain/1/device/vbd = ""
	/local/domain/1/device/vbd/51712 = ""
	/local/domain/1/device/vbd/51712/backend = 
"/local/domain/0/backend/vbd/1/51712"
	/local/domain/1/device/vbd/51712/backend-id = "0"
	/local/domain/1/device/vbd/51712/state = "4"
	/local/domain/1/device/vbd/51712/virtual-device = "51712"
	/local/domain/1/device/vbd/51712/device-type = "disk"
	/local/domain/1/device/vbd/51712/ring-ref = "8"
	/local/domain/1/device/vbd/51712/event-channel = "15"
	/local/domain/1/device/vbd/51712/protocol = "x86_64-abi"
	/local/domain/1/device/vbd/51712/feature-persistent = "1"
	/local/domain/1/device/vbd/51776 = ""
	/local/domain/1/device/vbd/51776/backend = 
"/local/domain/0/backend/vbd/1/51776"
	/local/domain/1/device/vbd/51776/backend-id = "0"
	/local/domain/1/device/vbd/51776/state = "4"
	/local/domain/1/device/vbd/51776/virtual-device = "51776"
	/local/domain/1/device/vbd/51776/device-type = "disk"
	/local/domain/1/device/vbd/51776/ring-ref = "9"
	/local/domain/1/device/vbd/51776/event-channel = "16"
	/local/domain/1/device/vbd/51776/protocol = "x86_64-abi"
	/local/domain/1/device/vbd/51776/feature-persistent = "1"
	/local/domain/1/device/vbd/51792 = ""
	/local/domain/1/device/vbd/51792/backend = 
"/local/domain/0/backend/vbd/1/51792"
	/local/domain/1/device/vbd/51792/backend-id = "0"
	/local/domain/1/device/vbd/51792/state = "4"
	/local/domain/1/device/vbd/51792/virtual-device = "51792"
	/local/domain/1/device/vbd/51792/device-type = "disk"
	/local/domain/1/device/vbd/51792/ring-ref = "10"
	/local/domain/1/device/vbd/51792/event-channel = "17"
	/local/domain/1/device/vbd/51792/protocol = "x86_64-abi"
	/local/domain/1/device/vbd/51792/feature-persistent = "1"
	/local/domain/1/device/vbd/51808 = ""
	/local/domain/1/device/vbd/51808/backend = 
"/local/domain/0/backend/vbd/1/51808"
	/local/domain/1/device/vbd/51808/backend-id = "0"
	/local/domain/1/device/vbd/51808/state = "4"
	/local/domain/1/device/vbd/51808/virtual-device = "51808"
	/local/domain/1/device/vbd/51808/device-type = "disk"
	/local/domain/1/device/vbd/51808/ring-ref = "11"
	/local/domain/1/device/vbd/51808/event-channel = "18"
	/local/domain/1/device/vbd/51808/protocol = "x86_64-abi"
	/local/domain/1/device/vbd/51808/feature-persistent = "1"
	/local/domain/1/device/vkbd = ""
	/local/domain/1/device/vkbd/0 = ""
	/local/domain/1/device/vkbd/0/backend = "/local/domain/0/backend/vkbd/1/0"
	/local/domain/1/device/vkbd/0/backend-id = "0"
	/local/domain/1/device/vkbd/0/state = "4"
	/local/domain/1/device/vkbd/0/request-abs-pointer = "1"
	/local/domain/1/device/vkbd/0/page-ref = "253746"
	/local/domain/1/device/vkbd/0/page-gref = "1249"
	/local/domain/1/device/vkbd/0/event-channel = "22"
	/local/domain/1/device/vif = ""
	/local/domain/1/device/vif/0 = ""
	/local/domain/1/device/vif/0/backend = "/local/domain/0/backend/vif/1/0"
	/local/domain/1/device/vif/0/backend-id = "0"
	/local/domain/1/device/vif/0/state = "4"
	/local/domain/1/device/vif/0/handle = "0"
	/local/domain/1/device/vif/0/mac = "00:16:3e:10:00:01"
	/local/domain/1/device/vif/0/multi-queue-num-queues = "1"
	/local/domain/1/device/vif/0/tx-ring-ref = "768"
	/local/domain/1/device/vif/0/rx-ring-ref = "769"
	/local/domain/1/device/vif/0/event-channel-tx = "20"
	/local/domain/1/device/vif/0/event-channel-rx = "21"
	/local/domain/1/device/vif/0/request-rx-copy = "1"
	/local/domain/1/device/vif/0/feature-rx-notify = "1"
	/local/domain/1/device/vif/0/feature-sg = "1"
	/local/domain/1/device/vif/0/feature-gso-tcpv4 = "1"
	/local/domain/1/device/vif/0/feature-gso-tcpv6 = "1"
	/local/domain/1/device/vif/0/feature-ipv6-csum-offload = "1"
	/local/domain/1/control = ""
	/local/domain/1/control/shutdown = ""
	/local/domain/1/control/platform-feature-multiprocessor-suspend = "1"
	/local/domain/1/control/platform-feature-xs_reset_watches = "1"
	/local/domain/1/hvmloader = ""
	/local/domain/1/hvmloader/bios = "ovmf"
	/local/domain/1/hvmloader/allow-memory-relocate = "0"
	/local/domain/1/data = ""
	/local/domain/1/domid = "1"
	/local/domain/1/store = ""
	/local/domain/1/store/port = "1"
	/local/domain/1/store/ring-ref = "1044476"
	/local/domain/1/platform = ""
	/local/domain/1/platform/acpi = "1"
	/local/domain/1/platform/acpi_s3 = "1"
	/local/domain/1/platform/acpi_s4 = "1"
	/local/domain/1/console = ""
	/local/domain/1/console/backend = "/local/domain/0/backend/console/1/0"
	/local/domain/1/console/backend-id = "0"
	/local/domain/1/console/limit = "1048576"
	/local/domain/1/console/type = "xenconsoled"
	/local/domain/1/console/output = "pty"
	/local/domain/1/console/tty = "/dev/pts/0"
	/local/domain/1/console/port = "2"
	/local/domain/1/console/ring-ref = "1044479"
	/local/domain/1/console/vnc-listen = "0.0.0.0"
	/local/domain/1/console/vnc-port = "5901"
	/local/domain/1/image = ""
	/local/domain/1/image/device-model-pid = "3405"
	/local/domain/1/serial = ""
	/local/domain/1/serial/0 = ""
	/local/domain/1/serial/0/tty = "/dev/pts/1"

> First observation is that the log message starts with d1v0, which means
> domain 1 vcpu 0, so Dom0 is irrelevant in that case.

ok

> The guest kernel command line looks normal.
>
> You can also verify if your guest is trying to balloon in memory by
> looking at sysfs knobs.
>
> According to Linux kernel documentation, the relevant knobs live under
>
> /sys/devices/system/xen_memory0/*

Here, anyway, at Guest

	/sys/devices/system/xen_memory/xen_memory0/*

	tree /sys/devices/system/xen_memory/xen_memory0
		/sys/devices/system/xen_memory/xen_memory0
		├── info
		│   ├── current_kb
		│   ├── high_kb
		│   └── low_kb
		├── max_retry_count
		├── max_schedule_delay
		├── power
		│   ├── async
		│   ├── autosuspend_delay_ms
		│   ├── control
		│   ├── runtime_active_kids
		│   ├── runtime_active_time
		│   ├── runtime_enabled
		│   ├── runtime_status
		│   ├── runtime_suspended_time
		│   └── runtime_usage
		├── retry_count
		├── schedule_delay
		├── subsystem -> ../../../../bus/xen_memory
		├── target
		├── target_kb
		└── uevent

IIUC (?), it's the *_kb that are relevant

	find . | grep _kb
		./info/current_kb
		./info/low_kb
		./info/high_kb
		./target_kb

	cat `find . | grep _kb`
		2079272
		131064
		0
		2080768

Comparing to that at the Dom0

	cat `find . | grep _kb`
		4194304
		121064
		0
		4194304

I note only that at the Guest, (target_kb) > (current_kb).

Fwiw, in my Guest config

	...
	bios   = 'ovmf'
	maxmem = 2048
	memory = 2048
	hap    = 1
	shadow_memory = 16
	...


>>> Do you see the same message repeated when using seabios?
>>
>> Haven't yet checked.
>>
>> Atm, I've only UEFI guests, setup.  To test, I'll just have to spin up a
>> non-UEFI guest.  A bit later ...
>
> Yes, this would be helpful for identifying the issue.

I'll post back when I have an answer.

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      reply	other threads:[~2016-03-18 16:19 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-18 15:21 Xen 4.6 --with-ovmf, on UEFI Dom0 host up/running, but logging repeated "d1v0 Over-allocation for domain" ? PGNet Dev
2016-03-18 15:48 ` Wei Liu
2016-03-18 15:55   ` PGNet Dev
2016-03-18 16:03     ` Wei Liu
2016-03-18 16:19       ` PGNet Dev [this message]

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