Date: Sat, 29 May 2021 15:25:23 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 254513] virtio_random: random_harvestq spinning on a CPU with Q35 virtio random device Message-ID: <bug-254513-27103-I7QS00Tt9z@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-254513-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-254513-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254513 --- Comment #10 from Matthias Andree <mandree@FreeBSD.org> --- since my virtual server is rented with just one core, it goes down to a cra= wl. More information: # kldload virtio_random ; devinfo -p vtrnd0 -v ; kldunload virtio_random vtrnd0 pnpinfo vendor=3D0x00001af4 device=3D0x1005 subvendor=3D0x1af4 device_type=3D0x00000004 virtio_pci4 pnpinfo vendor=3D0x1af4 device=3D0x1005 subvendor=3D0x1af4 subdevice=3D0x0004 class=3D0x00ff00 at slot=3D7 function=3D0 dbsf=3Dpci0:0:= 7:0 handle=3D\_SB_.PCI0.S38_ pci0 pcib0 pnpinfo _HID=3DPNP0A03 _UID=3D1 _CID=3Dnone at handle=3D\_SB_.PCI0 acpi0 nexus0 # pciconf -l -v [...] virtio_pci4@pci0:0:7:0: class=3D0x00ff00 rev=3D0x00 hdr=3D0x00 vendor=3D0x1= af4 device=3D0x1005 subvendor=3D0x1af4 subdevice=3D0x0004 vendor =3D 'Red Hat, Inc.' device =3D 'Virtio RNG' class =3D old # dmesg CPU: Intel Xeon E312xx (Sandy Bridge) (2600.04-MHz K8-class CPU) Origin=3D"GenuineIntel" Id=3D0x206a1 Family=3D0x6 Model=3D0x2a Steppi= ng=3D1 =20 Features=3D0x783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,M= CA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2> =20 Features2=3D0x9fba2203<SSE3,PCLMULQDQ,SSSE3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,= POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,HV> AMD Features=3D0x28100800<SYSCALL,NX,RDTSCP,LM> AMD Features2=3D0x1<LAHF> XSAVE Features=3D0x1<XSAVEOPT> ... virtio_pci0: <VirtIO PCI (legacy) Network adapter> port 0xc0a0-0xc0bf mem 0xfebf1000-0xfebf1fff,0xfe000000-0xfe003fff irq 11 at device 3.0 on pci0 vtnet0: <VirtIO Networking Adapter> on virtio_pci0 vtnet0: Ethernet address: 00:1a:4a:d0:17:bf vtnet0: netmap queues/slots: TX 1/256, RX 1/128 000.000760 [ 450] vtnet_netmap_attach vtnet attached txq=3D1, txd=3D2= 56 rxq=3D1, rxd=3D128 virtio_pci1: <VirtIO PCI (legacy) Block adapter> port 0xc000-0xc03f mem 0xfebf2000-0xfebf2fff,0xfe004000-0xfe007fff irq 11 at device 4.0 on pci0 vtblk0: <VirtIO Block Adapter> on virtio_pci1 vtblk0: 20480MB (41943040 512 byte sectors) virtio_pci2: <VirtIO PCI (legacy) Block adapter> port 0xc040-0xc07f mem 0xfebf3000-0xfebf3fff,0xfe008000-0xfe00bfff irq 10 at device 5.0 on pci0 vtblk1: <VirtIO Block Adapter> on virtio_pci2 vtblk1: 1024MB (2097152 512 byte sectors) virtio_pci3: <VirtIO PCI (legacy) Balloon adapter> port 0xc0c0-0xc0df mem 0xfe00c000-0xfe00ffff irq 10 at device 6.0 on pci0 vtballoon0: <VirtIO Balloon Adapter> on virtio_pci3 virtio_pci4: <VirtIO PCI (legacy) Entropy adapter> port 0xc0e0-0xc0ff mem 0xfe010000-0xfe013fff irq 11 at device 7.0 on pci0 ... vtrnd0: <VirtIO Entropy Adapter> on virtio_pci4 random: registering fast source VirtIO Entropy Adapter [... kldunload here ...] vtrnd0: detached # kldload virtio_random ; sleep 5 ; procstat -w 1 kstack 7 ; kldunload virtio_random PID TID COMM TDNAME KSTACK=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 7 100061 rand_harvestq - mi_switch sleepq_timed= wait _sleep random_kthread fork_exit fork_trampoline=20 7 100061 rand_harvestq - mi_switch sleepq_timed= wait _sleep random_kthread fork_exit fork_trampoline=20 7 100061 rand_harvestq - mi_switch sleepq_timed= wait _sleep random_kthread fork_exit fork_trampoline=20 7 100061 rand_harvestq - mi_switch sleepq_timed= wait _sleep random_kthread fork_exit fork_trampoline --=20 You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug.=
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