Very slow startup (40 seconds)

### Version

Microsoft Windows [Version 10.0.19044.1766]

### WSL Version

- [X] WSL 2
- [ ] WSL 1

### Kernel Version

5.10.102.1-microsoft-standard-WSL2

### Distro Version

Ubuntu 20.04

### Other Software

_No response_

### Repro Steps

Start Ubuntu distro.

### Expected Behavior

Faster (sub 2sec) startup.

### Actual Behavior

It takes about 40 seconds to boot.

### Diagnostic Logs

[ 0.000000] Linux version 5.10.102.1-microsoft-standard-WSL2 (oe-user@oe-host) (x86_64-msft-linux-gcc (GCC) 9.3.0, GNU ld (GNU Binutils) 2.34.0.20200220) https://github.com/microsoft/WSL/issues/1 SMP Wed Mar 2 00:30:59 UTC 2022
[ 0.000000] Command line: initrd=\initrd.img panic=-1 pty.legacy_count=0 nr_cpus=16
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Centaur CentaurHauls
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'compacted' format.
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009ffff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000e0fff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000001fffff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x0000000000200000-0x00000000f7ffffff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x0000000bffffffff] usable
[ 0.000000] BIOS-e820: [mem 0x0000001000000000-0x0000001d9d3fffff] usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI not present or invalid.
[ 0.000000] Hypervisor detected: Microsoft Hyper-V
[ 0.000000] Hyper-V: privilege flags low 0x2e7f, high 0x3b8030, hints 0x20c2c, misc 0x20bed7b2
[ 0.000000] Hyper-V Host Build:19041-10.0-1-0.1766
[ 0.000000] Hyper-V: LAPIC Timer Frequency: 0x1e8480
[ 0.000000] Hyper-V: Using hypercall for remote TLB flush
[ 0.000000] clocksource: hyperv_clocksource_tsc_page: mask: 0xffffffffffffffff max_cycles: 0x24e6a1710, max_idle_ns: 440795202120 ns
[ 0.000000] tsc: Marking TSC unstable due to running on Hyper-V
[ 0.000001] tsc: Detected 3600.010 MHz processor
[ 0.000008] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000009] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000011] last_pfn = 0x1d9d400 max_arch_pfn = 0x400000000
[ 0.000023] MTRR default type: uncachable
[ 0.000023] MTRR fixed ranges enabled:
[ 0.000024] 00000-3FFFF write-back
[ 0.000024] 40000-7FFFF uncachable
[ 0.000024] 80000-8FFFF write-back
[ 0.000025] 90000-FFFFF uncachable
[ 0.000025] MTRR variable ranges enabled:
[ 0.000026] 0 base 0000000000 mask 7F00000000 write-back
[ 0.000026] 1 base 0100000000 mask 7000000000 write-back
[ 0.000027] 2 base 1000000000 mask 0000000000 write-back
[ 0.000027] 3 disabled
[ 0.000028] 4 disabled
[ 0.000028] 5 disabled
[ 0.000028] 6 disabled
[ 0.000028] 7 disabled
[ 0.000032] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.000039] last_pfn = 0xf8000 max_arch_pfn = 0x400000000
[ 0.000046] Using GB pages for direct mapping
[ 0.000293] RAMDISK: [mem 0x03835000-0x03844fff]
[ 0.000294] ACPI: Early table checksum verification disabled
[ 0.000301] ACPI: RSDP 0x00000000000E0000 000024 (v02 VRTUAL)
[ 0.000304] ACPI: XSDT 0x0000000000100000 000044 (v01 VRTUAL MICROSFT 00000001 MSFT 00000001)
[ 0.000307] ACPI: FACP 0x0000000000101000 000114 (v06 VRTUAL MICROSFT 00000001 MSFT 00000001)
[ 0.000310] ACPI: DSDT 0x00000000001011B8 01E184 (v02 MSFTVM DSDT01 00000001 MSFT 05000000)
[ 0.000312] ACPI: FACS 0x0000000000101114 000040
[ 0.000313] ACPI: OEM0 0x0000000000101154 000064 (v01 VRTUAL MICROSFT 00000001 MSFT 00000001)
[ 0.000315] ACPI: SRAT 0x000000000011F33C 000310 (v02 VRTUAL MICROSFT 00000001 MSFT 00000001)
[ 0.000317] ACPI: APIC 0x000000000011F64C 0000C8 (v04 VRTUAL MICROSFT 00000001 MSFT 00000001)
[ 0.000318] ACPI: Reserving FACP table memory at [mem 0x101000-0x101113]
[ 0.000319] ACPI: Reserving DSDT table memory at [mem 0x1011b8-0x11f33b]
[ 0.000319] ACPI: Reserving FACS table memory at [mem 0x101114-0x101153]
[ 0.000320] ACPI: Reserving OEM0 table memory at [mem 0x101154-0x1011b7]
[ 0.000320] ACPI: Reserving SRAT table memory at [mem 0x11f33c-0x11f64b]
[ 0.000321] ACPI: Reserving APIC table memory at [mem 0x11f64c-0x11f713]
[ 0.000325] ACPI: Local APIC address 0xfee00000
[ 0.000515] Zone ranges:
[ 0.000516] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.000517] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.000518] Normal [mem 0x0000000100000000-0x0000001d9d3fffff]
[ 0.000519] Device empty
[ 0.000519] Movable zone start for each node
[ 0.000520] Early memory node ranges
[ 0.000520] node 0: [mem 0x0000000000001000-0x000000000009ffff]
[ 0.000521] node 0: [mem 0x0000000000200000-0x00000000f7ffffff]
[ 0.000522] node 0: [mem 0x0000000100000000-0x0000000bffffffff]
[ 0.000523] node 0: [mem 0x0000001000000000-0x0000001d9d3fffff]
[ 0.000526] Initmem setup node 0 [mem 0x0000000000001000-0x0000001d9d3fffff]
[ 0.000527] On node 0 totalpages: 26825375
[ 0.000527] DMA zone: 59 pages used for memmap
[ 0.000528] DMA zone: 22 pages reserved
[ 0.000528] DMA zone: 3743 pages, LIFO batch:0
[ 0.000529] DMA32 zone: 16320 pages used for memmap
[ 0.000529] DMA32 zone: 1011712 pages, LIFO batch:63
[ 0.000530] Normal zone: 403280 pages used for memmap
[ 0.000530] Normal zone: 25809920 pages, LIFO batch:63
[ 0.000673] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.000692] On node 0, zone DMA: 352 pages in unavailable ranges
[ 0.010651] On node 0, zone Normal: 11264 pages in unavailable ranges
[ 0.010672] ACPI: Local APIC address 0xfee00000
[ 0.010676] ACPI: LAPIC_NMI (acpi_id[0x01] dfl dfl lint[0x1])
[ 0.010854] IOAPIC[0]: apic_id 16, version 17, address 0xfec00000, GSI 0-23
[ 0.010857] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.010858] ACPI: IRQ9 used by override.
[ 0.010859] Using ACPI (MADT) for SMP configuration information
[ 0.010863] smpboot: Allowing 16 CPUs, 0 hotplug CPUs
[ 0.010867] [mem 0xf8000000-0xffffffff] available for PCI devices
[ 0.010868] Booting paravirtualized kernel on Hyper-V
[ 0.010869] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.014235] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:16 nr_node_ids:1
[ 0.014711] percpu: Embedded 56 pages/cpu s190040 r8192 d31144 u262144
[ 0.014714] pcpu-alloc: s190040 r8192 d31144 u262144 alloc=1*2097152
[ 0.014716] pcpu-alloc: [0] 00 01 02 03 04 05 06 07 [0] 08 09 10 11 12 13 14 15
[ 0.014728] Hyper-V: PV spinlocks enabled
[ 0.014729] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.014731] Built 1 zonelists, mobility grouping on. Total pages: 26405694
[ 0.014732] Kernel command line: initrd=\initrd.img panic=-1 pty.legacy_count=0 nr_cpus=16
[ 0.020981] Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes, linear)
[ 0.024138] Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes, linear)
[ 0.024251] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.041980] Memory: 4085908K/107301500K available (16404K kernel code, 2544K rwdata, 9048K rodata, 1580K init, 2772K bss, 1886388K reserved, 0K cma-reserved)
[ 0.042013] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=16, Nodes=1
[ 0.042018] ftrace: allocating 51665 entries in 202 pages
[ 0.053276] ftrace: allocated 202 pages with 4 groups
[ 0.053473] rcu: Hierarchical RCU implementation.
[ 0.053474] rcu: RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=16.
[ 0.053475] Rude variant of Tasks RCU enabled.
[ 0.053475] Tracing variant of Tasks RCU enabled.
[ 0.053476] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.053476] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=16
[ 0.055699] Using NULL legacy PIC
[ 0.055700] NR_IRQS: 16640, nr_irqs: 552, preallocated irqs: 0
[ 0.056038] random: crng done (trusting CPU's manufacturer)
[ 0.056054] Console: colour dummy device 80x25
[ 0.056059] printk: console [tty0] enabled
[ 0.056064] ACPI: Core revision 20200925
[ 0.056185] Failed to register legacy timer interrupt
[ 0.056185] APIC: Switch to symmetric I/O mode setup
[ 0.056187] Switched APIC routing to physical flat.
[ 0.056198] Hyper-V: Using IPI hypercalls
[ 0.056198] Hyper-V: Using enlightened APIC (xapic mode)
[ 0.056253] Calibrating delay loop (skipped), value calculated using timer frequency.. 7200.02 BogoMIPS (lpj=36000100)
[ 0.056255] pid_max: default: 32768 minimum: 301
[ 0.056269] LSM: Security Framework initializing
[ 0.056341] Mount-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[ 0.056551] Mountpoint-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[ 0.056742] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 0.056743] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0, 1GB 4
[ 0.056745] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 0.056745] Spectre V2 : Mitigation: Full generic retpoline
[ 0.056746] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[ 0.056746] Spectre V2 : Enabling Restricted Speculation for firmware calls
[ 0.056747] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 0.056747] Spectre V2 : User space: Mitigation: STIBP via seccomp and prctl
[ 0.056748] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl and seccomp
[ 0.056749] TAA: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.056750] SRBDS: Unknown: Dependent on hypervisor status
[ 0.056750] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.056852] Freeing SMP alternatives memory: 56K
[ 0.057709] smpboot: CPU0: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz (family: 0x6, model: 0x9e, stepping: 0xc)
[ 0.057763] Performance Events: unsupported p6 CPU model 158 no PMU driver, software events only.
[ 0.057777] rcu: Hierarchical SRCU implementation.
[ 0.058066] smp: Bringing up secondary CPUs ...
[ 0.058104] x86: Booting SMP configuration:
[ 0.058105] .... node #0, CPUs: https://github.com/microsoft/WSL/issues/1
[ 0.058391] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
[ 0.058391] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
[ 0.058391] https://github.com/microsoft/WSL/issues/2 https://github.com/microsoft/WSL/issues/3 https://github.com/microsoft/WSL/issues/4 https://github.com/microsoft/WSL/issues/5 https://github.com/microsoft/WSL/issues/6 https://github.com/microsoft/WSL/issues/7 https://github.com/microsoft/WSL/issues/8 https://github.com/microsoft/WSL/issues/9 https://github.com/microsoft/WSL/issues/10 https://github.com/microsoft/WSL/issues/11 https://github.com/microsoft/WSL/issues/12 https://github.com/microsoft/WSL/issues/13 https://github.com/microsoft/WSL/issues/14 https://github.com/microsoft/WSL/issues/15
[ 0.058391] smp: Brought up 1 node, 16 CPUs
[ 0.058391] smpboot: Max logical packages: 1
[ 0.058391] smpboot: Total of 16 processors activated (115200.32 BogoMIPS)
[ 0.176277] node 0 deferred pages initialised in 120ms
[ 0.177206] devtmpfs: initialized
[ 0.177206] x86/mm: Memory block size: 128MB
[ 0.178294] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.178294] futex hash table entries: 4096 (order: 6, 262144 bytes, linear)
[ 0.178294] NET: Registered protocol family 16
[ 0.178294] thermal_sys: Registered thermal governor 'step_wise'
[ 0.178294] cpuidle: using governor menu
[ 0.178294] ACPI: bus type PCI registered
[ 0.178294] PCI: Fatal: No config space access function found
[ 0.178294] Kprobes globally optimized
[ 0.178294] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.178294] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.178294] raid6: skip pq benchmark and using algorithm avx2x4
[ 0.178294] raid6: using avx2x2 recovery algorithm
[ 0.178294] ACPI: Added _OSI(Module Device)
[ 0.178294] ACPI: Added _OSI(Processor Device)
[ 0.178294] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.178294] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.178294] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.178294] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 0.178294] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[ 0.187157] ACPI: 1 ACPI AML tables successfully acquired and loaded
[ 0.187778] ACPI: Interpreter enabled
[ 0.187780] ACPI: (supports S0 S5)
[ 0.187781] ACPI: Using IOAPIC for interrupt routing
[ 0.187785] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.187890] ACPI: Enabled 1 GPEs in block 00 to 0F
[ 0.188543] iommu: Default domain type: Translated
[ 0.188592] SCSI subsystem initialized
[ 0.188594] ACPI: bus type USB registered
[ 0.188600] usbcore: registered new interface driver usbfs
[ 0.188602] usbcore: registered new interface driver hub
[ 0.188608] usbcore: registered new device driver usb
[ 0.188630] hv_vmbus: Vmbus version:5.2
[ 0.188630] PCI: Using ACPI for IRQ routing
[ 0.188630] PCI: System does not support PCI
[ 0.188630] hv_vmbus: Unknown GUID: c376c1c3-d276-48d2-90a9-c04748072c60
[ 0.188630] clocksource: Switched to clocksource hyperv_clocksource_tsc_page
[ 0.304982] VFS: Disk quotas dquot_6.6.0
[ 0.304989] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.305001] FS-Cache: Loaded
[ 0.305017] pnp: PnP ACPI init
[ 0.305044] pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active)
[ 0.305082] pnp: PnP ACPI: found 1 devices
[ 0.309505] NET: Registered protocol family 2
[ 0.309750] IP idents hash table entries: 262144 (order: 9, 2097152 bytes, linear)
[ 0.310889] tcp_listen_portaddr_hash hash table entries: 65536 (order: 8, 1048576 bytes, linear)
[ 0.311110] TCP established hash table entries: 524288 (order: 10, 4194304 bytes, linear)
[ 0.311715] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes, linear)
[ 0.311792] TCP: Hash tables configured (established 524288 bind 65536)
[ 0.311818] UDP hash table entries: 65536 (order: 9, 2097152 bytes, linear)
[ 0.312095] UDP-Lite hash table entries: 65536 (order: 9, 2097152 bytes, linear)
[ 0.312388] NET: Registered protocol family 1
[ 0.312939] RPC: Registered named UNIX socket transport module.
[ 0.312939] RPC: Registered udp transport module.
[ 0.312940] RPC: Registered tcp transport module.
[ 0.312940] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.312942] PCI: CLS 0 bytes, default 64
[ 0.312989] Trying to unpack rootfs image as initramfs...
[ 0.313155] Freeing initrd memory: 64K
[ 0.313157] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 0.313158] software IO TLB: mapped [mem 0x00000000f4000000-0x00000000f8000000] (64MB)
[ 0.313219] kvm: no hardware support
[ 0.313220] has_svm: not amd or hygon
[ 0.313220] kvm: no hardware support
[ 0.316023] Initialise system trusted keyrings
[ 0.316090] workingset: timestamp_bits=46 max_order=25 bucket_order=0
[ 0.316811] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.316924] NFS: Registering the id_resolver key type
[ 0.316931] Key type id_resolver registered
[ 0.316931] Key type id_legacy registered
[ 0.316933] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 0.316934] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 0.316935] Installing knfsd (copyright (C) 1996 [okir@monad.swb.de](mailto:okir@monad.swb.de)).
[ 0.317308] Key type cifs.idmap registered
[ 0.317351] fuse: init (API version 7.32)
[ 0.317447] SGI XFS with ACLs, security attributes, realtime, scrub, repair, quota, no debug enabled
[ 0.317650] 9p: Installing v9fs 9p2000 file system support
[ 0.317656] FS-Cache: Netfs '9p' registered for caching
[ 0.317683] FS-Cache: Netfs 'ceph' registered for caching
[ 0.317685] ceph: loaded (mds proto 32)
[ 0.322760] NET: Registered protocol family 38
[ 0.322761] xor: automatically using best checksumming function avx
[ 0.322763] Key type asymmetric registered
[ 0.322764] Asymmetric key parser 'x509' registered
[ 0.322915] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
[ 0.324184] hv_vmbus: registering driver hv_pci
[ 0.324705] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 0.325088] Non-volatile memory driver v1.3
[ 0.327942] brd: module loaded
[ 0.328736] loop: module loaded
[ 0.328765] hv_vmbus: registering driver hv_storvsc
[ 0.329096] wireguard: WireGuard 1.0.0 loaded. See [www.wireguard.com](http://www.wireguard.com/) for information.
[ 0.329096] wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld [Jason@zx2c4.com](mailto:Jason@zx2c4.com). All Rights Reserved.
[ 0.329105] tun: Universal TUN/TAP device driver, 1.6
[ 0.329176] PPP generic driver version 2.4.2
[ 0.329271] PPP BSD Compression module registered
[ 0.329272] PPP Deflate Compression module registered
[ 0.329274] PPP MPPE Compression module registered
[ 0.329274] NET: Registered protocol family 24
[ 0.329281] usbcore: registered new interface driver cdc_ether
[ 0.329286] usbcore: registered new interface driver cdc_ncm
[ 0.329286] hv_vmbus: registering driver hv_netvsc
[ 0.329374] VFIO - User Level meta-driver version: 0.3
[ 0.329505] usbcore: registered new interface driver cdc_acm
[ 0.329505] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 0.329512] usbcore: registered new interface driver ch341
[ 0.329513] usbserial: USB Serial support registered for ch341-uart
[ 0.329516] usbcore: registered new interface driver cp210x
[ 0.329518] usbserial: USB Serial support registered for cp210x
[ 0.329521] usbcore: registered new interface driver ftdi_sio
[ 0.329523] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 0.329671] vhci_hcd vhci_hcd.0: USB/IP Virtual Host Controller
[ 0.329673] vhci_hcd vhci_hcd.0: new USB bus registered, assigned bus number 1
[ 0.329676] vhci_hcd: created sysfs vhci_hcd.0
[ 0.329878] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[ 0.329879] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.329879] usb usb1: Product: USB/IP Virtual Host Controller
[ 0.329880] usb usb1: Manufacturer: Linux 5.10.102.1-microsoft-standard-WSL2 vhci_hcd
[ 0.329880] usb usb1: SerialNumber: vhci_hcd.0
[ 0.330061] hub 1-0:1.0: USB hub found
[ 0.330117] hub 1-0:1.0: 8 ports detected
[ 0.330454] scsi host0: storvsc_host_t
[ 0.330479] vhci_hcd vhci_hcd.0: USB/IP Virtual Host Controller
[ 0.330480] vhci_hcd vhci_hcd.0: new USB bus registered, assigned bus number 2
[ 0.330600] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[ 0.330882] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
[ 0.330883] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.330883] usb usb2: Product: USB/IP Virtual Host Controller
[ 0.330884] usb usb2: Manufacturer: Linux 5.10.102.1-microsoft-standard-WSL2 vhci_hcd
[ 0.330884] usb usb2: SerialNumber: vhci_hcd.0
[ 0.331012] hub 2-0:1.0: USB hub found
[ 0.331056] hub 2-0:1.0: 8 ports detected
[ 0.331246] hv_vmbus: registering driver hyperv_keyboard
[ 0.331370] rtc_cmos 00:00: RTC can wake from S4
[ 0.332522] rtc_cmos 00:00: registered as rtc0
[ 0.332802] rtc_cmos 00:00: setting system clock to 2022-06-30T13:01:27 UTC (1656594087)
[ 0.332810] rtc_cmos 00:00: alarms up to one month, 114 bytes nvram
[ 0.333055] device-mapper: ioctl: 4.43.0-ioctl (2020-10-01) initialised: [dm-devel@redhat.com](mailto:dm-devel@redhat.com)
[ 0.333206] device-mapper: raid: Loading target version 1.15.1
[ 0.333228] usbcore: registered new interface driver usbhid
[ 0.333229] usbhid: USB HID core driver
[ 0.333311] hv_utils: Registering HyperV Utility Driver
[ 0.333312] hv_vmbus: registering driver hv_utils
[ 0.333334] hv_vmbus: registering driver hv_balloon
[ 0.333338] hv_utils: cannot register PTP clock: 0
[ 0.333355] hv_vmbus: registering driver dxgkrnl
[ 0.333359] (NULL device *): dxgk: dxg_drv_init Version: 2216
[ 0.333373] drop_monitor: Initializing network drop monitor service
[ 0.333385] Mirror/redirect action on
[ 0.333767] hv_utils: TimeSync IC version 4.0
[ 0.333800] hv_balloon: Using Dynamic Memory protocol version 2.0
[ 0.333898] IPVS: Registered protocols (TCP, UDP)
[ 0.333924] IPVS: Connection hash table configured (size=4096, memory=64Kbytes)
[ 0.333952] IPVS: ipvs loaded.
[ 0.333953] IPVS: [rr] scheduler registered.
[ 0.333954] IPVS: [wrr] scheduler registered.
[ 0.333954] IPVS: [sh] scheduler registered.
[ 0.334177] ipip: IPv4 and MPLS over IPv4 tunneling driver
[ 0.334374] Free page reporting enabled
[ 0.334375] hv_balloon: Cold memory discard hint enabled
[ 0.335752] ipt_CLUSTERIP: ClusterIP Version 0.8 loaded successfully
[ 0.336103] Initializing XFRM netlink socket
[ 0.336140] NET: Registered protocol family 10
[ 0.336341] Segment Routing with IPv6
[ 0.337334] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 0.337384] NET: Registered protocol family 17
[ 0.337396] Bridge firewalling registered
[ 0.337401] 8021q: 802.1Q VLAN Support v1.8
[ 0.337414] sctp: Hash tables configured (bind 2048/2048)
[ 0.337602] 9pnet: Installing 9P2000 support
[ 0.337612] Key type dns_resolver registered
[ 0.337615] Key type ceph registered
[ 0.337695] libceph: loaded (mon/osd proto 15/24)
[ 0.337739] NET: Registered protocol family 40
[ 0.337739] hv_vmbus: registering driver hv_sock
[ 0.337756] IPI shorthand broadcast: enabled
[ 0.337761] sched_clock: Marking stable (337402400, 328500)->(344566800, -6835900)
[ 0.337951] registered taskstats version 1
[ 0.337957] Loading compiled-in X.509 certificates
[ 0.338089] Btrfs loaded, crc32c=crc32c-generic
[ 0.340368] Freeing unused kernel image (initmem) memory: 1580K
[ 0.406412] Write protecting the kernel read-only data: 28672k
[ 0.407103] Freeing unused kernel image (text/rodata gap) memory: 2024K
[ 0.407504] Freeing unused kernel image (rodata/data gap) memory: 1192K
[ 0.407506] Run /init as init process
[ 0.407506] with arguments:
[ 0.407506] /init
[ 0.407507] with environment:
[ 0.407507] HOME=/
[ 0.407507] TERM=linux
[ 38.826209] hv_vmbus: Unknown GUID: 6e382d18-3336-4f4b-acc4-2b7703d4df4a
[ 38.826268] hv_vmbus: Unknown GUID: dde9cbc0-5060-4436-9448-ea1254a5d177
[ 38.828949] hv_pci ff4c2fda-0b6c-4969-aee1-ee6b25a26548: PCI VMBus probing: Using version 0x10003
[ 38.829810] hv_pci ff4c2fda-0b6c-4969-aee1-ee6b25a26548: PCI host bridge to bus 0b6c:00
[ 38.830071] pci 0b6c:00:00.0: [1414:008e] type 00 class 0x030200
[ 38.834793] (NULL device *): dxgk: mmio allocated c00000000 200000000 c00000000 dffffffff
[ 38.957277] scsi 0:0:0:0: Direct-Access Msft Virtual Disk 1.0 PQ: 0 ANSI: 5
[ 38.957777] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 38.958799] sd 0:0:0:0: [sda] 536870912 512-byte logical blocks: (275 GB/256 GiB)
[ 38.958800] sd 0:0:0:0: [sda] 4096-byte physical blocks
[ 38.959023] sd 0:0:0:0: [sda] Write Protect is off
[ 38.959025] sd 0:0:0:0: [sda] Mode Sense: 0f 00 00 00
[ 38.959368] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 38.960707] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 39.242092] EXT4-fs (sda): mounted filesystem with ordered data mode. Opts: discard,errors=remount-ro,data=ordered
[ 39.346759] sd 0:0:0:0: [sda] Attached SCSI disk
[ 40.446435] Adding 27262976k swap on /swap/file. Priority:-2 extents:5 across:27295744k
[ 41.116585] scsi 0:0:0:1: Direct-Access Msft Virtual Disk 1.0 PQ: 0 ANSI: 5
[ 41.117146] sd 0:0:0:1: Attached scsi generic sg1 type 0
[ 41.118205] sd 0:0:0:1: [sdb] 536870912 512-byte logical blocks: (275 GB/256 GiB)
[ 41.118206] sd 0:0:0:1: [sdb] 4096-byte physical blocks
[ 41.118328] sd 0:0:0:1: [sdb] Write Protect is off
[ 41.118329] sd 0:0:0:1: [sdb] Mode Sense: 0f 00 00 00
[ 41.118625] sd 0:0:0:1: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 41.121488] sd 0:0:0:1: [sdb] Attached SCSI disk
[ 41.133377] EXT4-fs (sdb): mounted filesystem with ordered data mode. Opts: discard,errors=remount-ro,data=ordered
[ 41.143652] FS-Cache: Duplicate cookie detected
[ 41.143653] FS-Cache: O-cookie c=00000000dd6b555d [p=000000001bc55327 fl=222 nc=0 na=1]
[ 41.143654] FS-Cache: O-cookie d=0000000083bfbaeb n=000000000f13ab36
[ 41.143654] FS-Cache: O-key=[10] '34323934393431343035'
[ 41.143657] FS-Cache: N-cookie c=0000000089a002d8 [p=000000001bc55327 fl=2 nc=0 na=1]
[ 41.143658] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000a41eebbb
[ 41.143658] FS-Cache: N-key=[10] '34323934393431343035'
[ 41.269501] FS-Cache: Duplicate cookie detected
[ 41.269502] FS-Cache: O-cookie c=0000000068ab73f0 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 41.269503] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000cb304dd0
[ 41.269503] FS-Cache: O-key=[10] '34323934393431343138'
[ 41.269507] FS-Cache: N-cookie c=00000000f8ae9a8b [p=000000001bc55327 fl=2 nc=0 na=1]
[ 41.269507] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000a974287d
[ 41.269507] FS-Cache: N-key=[10] '34323934393431343138'
[ 41.271220] FS-Cache: Duplicate cookie detected
[ 41.271221] FS-Cache: O-cookie c=0000000068ab73f0 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 41.271221] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000cb304dd0
[ 41.271222] FS-Cache: O-key=[10] '34323934393431343138'
[ 41.271225] FS-Cache: N-cookie c=000000008cce34cf [p=000000001bc55327 fl=2 nc=0 na=1]
[ 41.271225] FS-Cache: N-cookie d=0000000083bfbaeb n=000000007debbb98
[ 41.271226] FS-Cache: N-key=[10] '34323934393431343138'
[ 41.272900] FS-Cache: Duplicate cookie detected
[ 41.272901] FS-Cache: O-cookie c=0000000068ab73f0 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 41.272902] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000cb304dd0
[ 41.272902] FS-Cache: O-key=[10] '34323934393431343138'
[ 41.272905] FS-Cache: N-cookie c=00000000119ca479 [p=000000001bc55327 fl=2 nc=0 na=1]
[ 41.272906] FS-Cache: N-cookie d=0000000083bfbaeb n=000000005c433c92
[ 41.272906] FS-Cache: N-key=[10] '34323934393431343138'
[ 41.274450] FS-Cache: Duplicate cookie detected
[ 41.274451] FS-Cache: O-cookie c=0000000068ab73f0 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 41.274451] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000cb304dd0
[ 41.274452] FS-Cache: O-key=[10] '34323934393431343138'
[ 41.274455] FS-Cache: N-cookie c=00000000119ca479 [p=000000001bc55327 fl=2 nc=0 na=1]
[ 41.274456] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000b4b79833
[ 41.274456] FS-Cache: N-key=[10] '34323934393431343138'
[ 41.275958] FS-Cache: Duplicate cookie detected
[ 41.275960] FS-Cache: O-cookie c=0000000068ab73f0 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 41.275960] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000cb304dd0
[ 41.275960] FS-Cache: O-key=[10] '34323934393431343138'
[ 41.275964] FS-Cache: N-cookie c=00000000119ca479 [p=000000001bc55327 fl=2 nc=0 na=1]
[ 41.275964] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000d26055ac
[ 41.275964] FS-Cache: N-key=[10] '34323934393431343138'
[ 49.208537] hv_balloon: Max. dynamic memory size: 104788 MB
[ 68.910114] EXT4-fs (sdb): mounted filesystem with ordered data mode. Opts: discard,errors=remount-ro,data=ordered
[ 68.921484] FS-Cache: Duplicate cookie detected
[ 68.921486] FS-Cache: O-cookie c=00000000bc269de8 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 68.921487] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000c5f50706
[ 68.921487] FS-Cache: O-key=[10] '34323934393434313833'
[ 68.921490] FS-Cache: N-cookie c=00000000de05fe51 [p=000000001bc55327 fl=2 nc=0 na=1]
[ 68.921491] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000d6f5c564
[ 68.921491] FS-Cache: N-key=[10] '34323934393434313833'
[ 69.049679] FS-Cache: Duplicate cookie detected
[ 69.049681] FS-Cache: O-cookie c=00000000720c1e76 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 69.049682] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000d4ae87e6
[ 69.049682] FS-Cache: O-key=[10] '34323934393434313936'
[ 69.049685] FS-Cache: N-cookie c=0000000089a002d8 [p=000000001bc55327 fl=2 nc=0 na=1]
[ 69.049686] FS-Cache: N-cookie d=0000000083bfbaeb n=000000008869727e
[ 69.049686] FS-Cache: N-key=[10] '34323934393434313936'
[ 69.051121] FS-Cache: Duplicate cookie detected
[ 69.051122] FS-Cache: O-cookie c=00000000720c1e76 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 69.051122] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000d4ae87e6
[ 69.051123] FS-Cache: O-key=[10] '34323934393434313936'
[ 69.051126] FS-Cache: N-cookie c=000000008cce34cf [p=000000001bc55327 fl=2 nc=0 na=1]
[ 69.051127] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000080ff813
[ 69.051127] FS-Cache: N-key=[10] '34323934393434313936'
[ 69.052353] FS-Cache: Duplicate cookie detected
[ 69.052354] FS-Cache: O-cookie c=00000000720c1e76 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 69.052355] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000d4ae87e6
[ 69.052355] FS-Cache: O-key=[10] '34323934393434313936'
[ 69.052358] FS-Cache: N-cookie c=00000000f8ae9a8b [p=000000001bc55327 fl=2 nc=0 na=1]
[ 69.052359] FS-Cache: N-cookie d=0000000083bfbaeb n=000000001ecc1257
[ 69.052359] FS-Cache: N-key=[10] '34323934393434313936'
[ 69.053636] FS-Cache: Duplicate cookie detected
[ 69.053637] FS-Cache: O-cookie c=00000000720c1e76 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 69.053637] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000d4ae87e6
[ 69.053638] FS-Cache: O-key=[10] '34323934393434313936'
[ 69.053641] FS-Cache: N-cookie c=00000000f8ae9a8b [p=000000001bc55327 fl=2 nc=0 na=1]
[ 69.053641] FS-Cache: N-cookie d=0000000083bfbaeb n=00000000174e009c
[ 69.053642] FS-Cache: N-key=[10] '34323934393434313936'
[ 69.055108] FS-Cache: Duplicate cookie detected
[ 69.055109] FS-Cache: O-cookie c=00000000720c1e76 [p=000000001bc55327 fl=222 nc=0 na=1]
[ 69.055109] FS-Cache: O-cookie d=0000000083bfbaeb n=00000000d4ae87e6
[ 69.055110] FS-Cache: O-key=[10] '34323934393434313936'
[ 69.055113] FS-Cache: N-cookie c=00000000f8ae9a8b [p=000000001bc55327 fl=2 nc=0 na=1]
[ 69.055113] FS-Cache: N-cookie d=0000000083bfbaeb n=0000000023001571
[ 69.055114] FS-Cache: N-key=[10] '34323934393434313936'
[ 99.961212] WSL2: Performing memory compaction.

Start by reproducing the reported 40-second startup for the Ubuntu 20.04 WSL 2 distro on Windows 10, then inspect the supplied diagnostic logs to identify where the delay occurs. Done means determining the startup bottleneck and reducing startup time toward the reported sub-2-second expectation.

Written by the indexing model from the issue text.