Re: Random guest crashes since 5c34d002dcc7 ("virtio_pci: use shared interrupts for virtqueues")

[Mike Galbraith <efault@gmx.de>]

On Tue, 2017-04-04 at 18:30 +0300, Michael S. Tsirkin wrote:

> I couldn't reproduce it - let's make sure we are using the
> same tree. Could you pls try
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next 
> 
> It's currently at cc79d42a7d7e57ff64f406a1fd3740afebac0b44

Things that make ya go hmm...

[   87.940161] ------------[ cut here ]------------
[   87.940180] WARNING: CPU: 0 PID: 97 at drivers/pci/msi.c:1251 pci_irq_vector+0xcb/0xe0
[   87.940181] Modules linked in: dm_mod(E) fuse(E) ebtable_filter(E) ebtables(E) rpcsec_gss_krb5(E) nfsv4(E) dns_resolver(E) nfs(E) fscache(E) nf_log_ipv6(E) xt_pkttype(E) nf_log_ipv4(E) nf_log_common(E) xt_LOG(E) xt_limit(E) af_packet(E) iscsi_ibft(E) iscsi_boot_sysfs(E) ip6t_REJECT(E) xt_tcpudp(E) nf_conntrack_ipv6(E) nf_defrag_ipv6(E) ip6table_raw(E) ipt_REJECT(E) iptable_raw(E) xt_CT(E) iptable_filter(E) ip6table_mangle(E) nf_conntrack_netbios_ns(E) nf_conntrack_broadcast(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E) ip_tables(E) xt_conntrack(E) nf_conntrack(E) libcrc32c(E) ip6table_filter(E) ip6_tables(E) x_tables(E) snd_hda_codec_generic(E) snd_hda_intel(E) snd_hda_codec(E) joydev(E) snd_hda_core(E) snd_hwdep(E) snd_pcm(E) snd_timer(E) snd(E) 8139too(E) ppdev(E) soundcore(E) parport_pc(E) i2c_piix4(E)
[   87.940206]  parport(E) virtio_balloon(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) ghash_clmulni_intel(E) serio_raw(E) acpi_cpufreq(E) pcbc(E) button(E) aesni_intel(E) pcspkr(E) aes_x86_64(E) crypto_simd(E) glue_helper(E) cryptd(E) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) ext4(E) crc16(E) jbd2(E) mbcache(E) hid_generic(E) usbhid(E) ata_generic(E) ata_piix(E) sr_mod(E) cdrom(E) virtio_blk(E) virtio_rng(E) virtio_console(E) qxl(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) ehci_pci(E) ttm(E) uhci_hcd(E) ehci_hcd(E) floppy(E) ahci(E) libahci(E) virtio_pci(E) drm(E) virtio_ring(E) virtio(E) usbcore(E) libata(E) 8139cp(E) mii(E) sg(E) scsi_mod(E) autofs4(E)
[   87.940233] CPU: 0 PID: 97 Comm: kworker/u16:1 Tainted: G            E   4.11.0-default #1
[   87.940234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20161202_174313-build11a 04/01/2014
[   87.940240] Workqueue: events_unbound async_run_entry_fn
[   87.940241] Call Trace:
[   87.940246]  ? dump_stack+0x5c/0x85
[   87.940255]  ? __warn+0xc4/0xe0
[   87.940258]  ? pci_pm_poweroff+0xf0/0xf0
[   87.940269]  ? pci_irq_vector+0xcb/0xe0
[   87.940272]  ? vp_synchronize_vectors+0x3e/0x50 [virtio_pci]
[   87.940275]  ? virtcons_freeze+0x1a/0xd0 [virtio_console]
[   87.940276]  ? virtio_pci_freeze+0x19/0x40 [virtio_pci]
[   87.940277]  ? pci_pm_freeze+0x59/0xe0
[   87.940281]  ? dpm_run_callback+0x4d/0x170
[   87.940283]  ? __device_suspend+0x11f/0x3b0
[   87.940283]  ? pm_dev_dbg+0x70/0x70
[   87.940284]  ? async_suspend+0x1a/0x90
[   87.940286]  ? async_run_entry_fn+0x34/0x160
[   87.940287]  ? process_one_work+0x164/0x430
[   87.940288]  ? worker_thread+0x135/0x4d0
[   87.940290]  ? kthread+0xff/0x140
[   87.940291]  ? rescuer_thread+0x3c0/0x3c0
[   87.940292]  ? kthread_park+0x80/0x80
[   87.940293]  ? kthread_park+0x80/0x80
[   87.940299]  ? ret_from_fork+0x26/0x40
[   87.940300] ---[ end trace 5d65fe0efc4b61d7 ]---