Bug 988768
| Summary: | QEMU core dumped when throttling windows guest system disk with bps_rd/iops_rd/bps/iops | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Sibiao Luo <sluo> |
| Component: | qemu-kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| Status: | CLOSED DUPLICATE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 6.5 | CC: | acathrow, bsarathy, chayang, famz, flang, juzhang, michen, mkenneth, qzhang, stefanha, virt-maint, xfu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-07-31 09:37:28 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
|
Description
Sibiao Luo
2013-07-26 10:28:29 UTC
My host cpu info: # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 8 On-line CPU(s) list: 0-7 Thread(s) per core: 2 Core(s) per socket: 4 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 42 Stepping: 7 CPU MHz: 1600.000 BogoMIPS: 6784.20 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 8192K NUMA node0 CPU(s): 0-7 processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz stepping : 7 cpu MHz : 1600.000 cache size : 8192 KB physical id : 0 siblings : 8 core id : 3 cpu cores : 4 apicid : 7 initial apicid : 7 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 6784.20 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: If only specify the bps=1024000 or iops=1024000 for windows guest, it also hit the same issue.
e.g:...-drive file=/dev/vg/system-disk.raw,if=none,id=drive-system-disk,format=raw,cache=none,aio=native,werror=stop,rerror=stop,serial="QEMU-DISK1",bps=1024000 -device virtio-scsi-pci,bus=pci.0,addr=0x4,id=scsi0 -device scsi-hd,drive=drive-system-disk,id=system-disk,bootindex=1
(qemu) Floating point exception (core dumped)
# gdb /usr/libexec/qemu-kvm /var/core.10154-0-0-8-1375064573-dhcp-11-229.nay.redhat.com-qemu-kvm
(gdb) bt
#0 0x00007f2cc7a40436 in bdrv_exceed_bps_limits (bs=0x7f2cc8e59010, is_write=false, nb_sectors=1)
at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:3621
#1 bdrv_exceed_io_limits (bs=0x7f2cc8e59010, is_write=false, nb_sectors=1)
at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:3732
#2 bdrv_io_limits_intercept (bs=0x7f2cc8e59010, is_write=false, nb_sectors=1)
at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:181
#3 0x00007f2cc7a40cbd in bdrv_co_do_readv (bs=0x7f2cc8e59010, sector_num=0, nb_sectors=1, qiov=0x7f2cb8000ab8,
flags=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:2136
#4 0x00007f2cc7a40fe3 in bdrv_co_do_rw (opaque=0x7f2cb8000b00) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:3880
#5 0x00007f2cc7a4733b in coroutine_trampoline (i0=<value optimized out>, i1=<value optimized out>)
at /usr/src/debug/qemu-kvm-0.12.1.2/coroutine-ucontext.c:129
#6 0x00007f2cc534eb70 in ?? () from /lib64/libc.so.6
#7 0x00007fffcb47ee10 in ?? ()
#8 0x0000000000000000 in ?? ()
(gdb)
e.g:...-drive file=/dev/vg/system-disk.raw,if=none,id=drive-system-disk,format=raw,cache=none,aio=native,werror=stop,rerror=stop,serial="QEMU-DISK1",iops=1024000 -device virtio-scsi-pci,bus=pci.0,addr=0x4,id=scsi0 -device scsi-hd,drive=drive-system-disk,id=system-disk,bootindex=1
(gdb) bt
#0 0x00007f8a3fe9150b in bdrv_exceed_iops_limits (bs=0x7f8a41efa010, is_write=false, nb_sectors=1)
at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:3683
#1 bdrv_exceed_io_limits (bs=0x7f8a41efa010, is_write=false, nb_sectors=1)
at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:3734
#2 bdrv_io_limits_intercept (bs=0x7f8a41efa010, is_write=false, nb_sectors=1)
at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:181
#3 0x00007f8a3fe91cbd in bdrv_co_do_readv (bs=0x7f8a41efa010, sector_num=0, nb_sectors=1, qiov=0x7f8a30000ab8,
flags=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:2136
#4 0x00007f8a3fe91fe3 in bdrv_co_do_rw (opaque=0x7f8a30000b00) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:3880
#5 0x00007f8a3fe9833b in coroutine_trampoline (i0=<value optimized out>, i1=<value optimized out>)
at /usr/src/debug/qemu-kvm-0.12.1.2/coroutine-ucontext.c:129
#6 0x00007f8a3d79fb70 in ?? () from /lib64/libc.so.6
#7 0x00007fff2f0bb0c0 in ?? ()
#8 0x0000000000000000 in ?? ()
(gdb)
1.Tried it with rhel6.5 guest that did not hit this issue. 2.Tried the the same image on rhel7 host that did not hit this issue. Base on above two points, this issue probability not virtio-win driver issue and only trigger with windows guest. Best Regards, sluo. Looked into the problem, this is indeed the same thing with 988658, for more information please see: https://bugzilla.redhat.com/show_bug.cgi?id=988658#c7 *** This bug has been marked as a duplicate of bug 988658 *** |