Fast booting q35 VM?

[Paul Menzel]

Dear Linux folks,


Starting a QEMU q35 with Linux built with `make defconfig`

    qemu7-system-x86_64 -M q35 -m 32G -enable-kvm -cpu host -smp 
cpus=32 -device virtio-rng-pci -net nic,model=virtio-net-pci -net 
user,hostfwd=tcp::22230-:22 -drive 
if=virtio,file=/scratch/local2/debian-linux-test.img -vga none -nographic

on a Supermicro AS -2023US-TR4/H11DSU-iN, BIOS 1.3 01/30/2020 the 
timings are (no initrd):

    [    0.000000] Command line: 
BOOT_IMAGE=/boot/vmlinuz-6.9.0-rc1-00274-g486291a0e624 root=/dev/vda1 ro 
quiet console=ttyS0 initcall_debug log_buf_len=4M
    […]
    [    0.000000] DMI: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 
rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
    […]
    [    0.007979] Initmem setup node 0 [mem 
0x0000000000001000-0x000000087fffffff]
    [    0.008235] On node 0, zone DMA: 1 pages in unavailable ranges
    [    0.008249] On node 0, zone DMA: 97 pages in unavailable ranges
    [    0.101045] On node 0, zone Normal: 36 pages in unavailable ranges
    [    0.101327] ACPI: PM-Timer IO Port: 0x608
    […]
    [    0.117844] mem auto-init: stack:all(zero), heap alloc:off, heap 
free:off
    [    0.117849] software IO TLB: area num 32.
    [    0.183645] Memory: 32848344K/33553896K available (18432K kernel 
code, 2792K rwdata, 6708K rodata, 2696K init, 1304K bss, 705292K 
reserved, 0K cma-reserved)
    [    0.183728] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=32, 
Nodes=1
    […]
    [    0.190074] x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
    [    0.190075] x86/fpu: Enabled xstate features 0x7, context size 
is 832 bytes, using 'compacted' format.
    [    0.211097] Freeing SMP alternatives memory: 48K
    [    0.211109] pid_max: default: 32768 minimum: 301
    […]
    [    0.218021] smp: Bringing up secondary CPUs ...
    [    0.218123] smpboot: x86: Booting SMP configuration:
    [    0.218125] .... node  #0, CPUs:        #1  #2  #3  #4  #5  #6 
#7  #8  #9 #10 #11 #12 #13 #14 #15 #16 #17 #18 #19 #20 #21 #22 #23 #24 
#25 #26 #27 #28 #29 #30 #31
    [    0.255165] smp: Brought up 1 node, 32 CPUs
    [    0.255175] smpboot: Total of 32 processors activated (140799.87 
BogoMIPS)
    [    0.270016] calling  acpi_init+0x0/0x530 @ 1
    […]
    [    0.372097] initcall acpi_init+0x0/0x530 returned 0 after 103000 
usecs
    [    1.385567] systemd[1]: systemd 255.4-1+b1 running in system 
mode (+PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT 
-GNUTLS +OPENSSL +ACL +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +IPTC 
+KMOD +LIBCRYPTSETUP +LIBFDISK +PCRE2 -PWQUALITY +P11KIT +QRENCODE +TPM2 
+BZIP2 +LZ4 +XZ +ZLIB +ZSTD -BPF_FRAMEWORK -XKBCOMMON +UTMP +SYSVINIT 
default-hierarchy=unified)

Please find the Linux messages attached.

I know, that there are ways to configure the VM differently – without 
PCI for example –, but in the end I also want to boot physical machines 
faster, so hopefully using a “standard VM” is a good start.


Kind regards,

Paul

linux-image-6.9-rc1+.txt
Description: Text document