Re: [RFT] kvm host suspend/resume

[Jeremy Katz <katzj-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

Avi Kivity wrote:
> I've committed kvm support for host suspend-to-disk (and hopefully 
> resume too).  This means you can suspend your machine with running vms, 
> and resume it later will all vms returning to the saved state.  This 
> should please laptop owners.

So testing with trunk (r4365) + 2.6.20-rc5-ish, I'm able to suspend and 
resume with the modules loaded.  Starting a guest after resume gets the 
following oops in the host; guest is in the grub menu at that point.

kvm: msrs: 1
invalid opcode: 0000 [#1]
SMP
last sysfs file: /class/net/eth0/carrier
Modules linked in: snd_hda_intel snd_hda_codec button kvm_intel kvm 
rfcomm hidp l2cap i915 drm ipt_MASQUERADE iptable_nat nf_nat ipv6 
autofs4 sunrpc bridge dummy nf_conntrack_netbios_ns ipt_REJECT 
nf_conntrack_ipv4 xt_state nf_conntrack nfnetlink xt_tcpudp 
iptable_filter ip_tables x_tables cpufreq_ondemand video sbs i2c_ec dock 
battery asus_acpi backlight ac parport_pc lp parport sr_mod cdrom 
snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device 
snd_pcm_oss snd_mixer_oss hci_usb fw_ohci snd_pcm e100 mii bluetooth 
sdhci ata_piix fw_core ipw3945 mmc_core sg serio_raw i2c_i801 iTCO_wdt 
iTCO_vendor_support snd_timer ieee80211 ieee80211_crypt ata_generic 
i2c_core snd soundcore snd_page_alloc joydev dm_snapshot dm_zero 
dm_mirror dm_mod ahci libata sd_mod scsi_mod ext3 jbd mbcache ehci_hcd 
ohci_hcd uhci_hcd
CPU:    1
EIP:    0060:[<f8d3bc6a>]    Not tainted VLI
EFLAGS: 00010207   (2.6.19-1.2913.fc7 #1)
EIP is at vmx_vcpu_load+0x49/0xc1 [kvm_intel]
eax: db452cbc   ebx: f2f5847c   ecx: 018e2100   edx: c075eb2c
esi: 00000001   edi: db452dc0   ebp: db452cd4   esp: db452cac
ds: 007b   es: 007b   ss: 0068
Process qemu (pid: 21176, ti=db452000 task=e2020030 task.ti=db452000)
Stack: 22222222 22222222 22222222 22222222 144d9000 00000000 db452dc0 
db452cd4
        f2f58484 f2f5847c db452ce4 f8e61ad6 f2f5847c f2f5847c db452cf0 
f8e6322f
        00000001 db452d4c f8d3cc69 c0603728 00000000 00000002 c0603751 
f2f58484
Call Trace:
  [<c04051c9>] show_trace_log_lvl+0x1a/0x2f
  [<c0405279>] show_stack_log_lvl+0x9b/0xa3
  [<c0405415>] show_registers+0x194/0x26a
  [<c0405618>] die+0x12d/0x242
  [<c0605167>] do_trap+0x79/0x91
  [<c0405bbb>] do_invalid_op+0x97/0xa1
  [<c0604f3c>] error_code+0x7c/0x84
  [<f8e61ad6>] vcpu_load+0x3b/0x3f [kvm]
  [<f8e6322f>] kvm_resched+0x20/0x23 [kvm]
  [<f8d3cc69>] kvm_vmx_return+0x1d0/0x1df [kvm_intel]
  [<f8e62139>] kvm_dev_ioctl+0x284/0x117a [kvm]
  [<c0482c36>] do_ioctl+0x22/0x67
  [<c0482ecd>] vfs_ioctl+0x252/0x265
  [<c0482f29>] sys_ioctl+0x49/0x64
  [<c0404058>] syscall_call+0x7/0xb
  =======================
Code: 00 40 39 73 48 89 45 e8 74 07 89 d8 e8 5d ff ff ff 8b 0c b5 80 b3 
71 c0 ba 2c eb 75 c0 8b 43 04 39 04 0a 74 31 89 04 0a 8d 45 e8 <0f> c7 
30 0f 96 c0 84 c0 74 21 8b 45 e8 8b 55 ec c7 04 24 a3 d4
EIP: [<f8d3bc6a>] vmx_vcpu_load+0x49/0xc1 [kvm_intel] SS:ESP 0068:db452cac


Jeremy

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