This bug is for one of the issues found while testing Bug #520693: the infinite recursion on grow_refcount_table() error handling. +++ This bug was initially created as a clone of Bug #520693 +++ [...] --- Additional comment from rsibley on 2009-10-12 13:00:48 EDT --- VM: Testing with IOmeter on a VW: w2k3 r2 sp2, and all of the latest updates, 1024MB memory, 1 CPU, VIRTIO drivers. Phyical Disk 1: size:20GB Actual size:12GB Format:COW Allocation:Sparse IOmeter 2006.07.27, Cycle # Outstanding I/Os -- run step outstanding I/Os on all disks at a time, Exponential Stepping start @1 end @64 Power of 2. Sequential Writes transfer request size @ 32KB and 64KB. Maximum Disk Size 0 Starting Disk Sector 0 Rhevm: RHEV Manager 2.1.0.35992, perf26 2.1.0.35993 sp209 HOST: CPU Name: 64-bit Intel with NX CPU Type: Genuine Intel(R) CPU @2.40GHz Number of CPUs: 16 Memory: 32166 MB MSA 1000, 10 disk RAID 0 LUN. QLA2xxx Linux perf26.lab.bos.redhat.com 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux etherboot-zroms-kvm-5.4.4-11.el5 kmod-kvm-83-125.el5 kvm-qemu-img-83-125.el5 kvm-debuginfo-83-125.el5 kvm-tools-83-125.el5 kvm-83-125.el5 Error: VM will crash, or hang with the following info. Using IOmeter Sequential Writes @ 32K, 64K transfer request size. On RHEV-M I get the following errors: Oct 12, 9:42 VM w2k3-io-125 is down. Exit message Lost connection with kvm process. Oct 12, 9:39 VM w2k3-io-125 has paused due to no Storage space error. vdsm.lg: http://10.16.18.203/rhevm/iometer_sequential_wrts_error_vdsm.log --- Additional comment from rsibley on 2009-10-12 15:08:10 EDT --- Added information for IOmeter Sequential Writes @ 32K/64K transfer request size error: dmesg | grep kvm kvm: virtualization flags detected on this hardware: vmx tpr_shadow vnmi flexpriority loaded kvm module (kvm-83-125.el5) kvm: emulating exchange as write qemu-kvm[8932]: segfault at 00000000414c4ff0 rip 00000000004195e0 rsp 00000000414c5008 error 6 --- Additional comment from ykaul on 2009-10-12 15:17:42 EDT --- (In reply to comment #28) > Added information for IOmeter Sequential Writes @ 32K/64K transfer request size > error: > > > dmesg | grep kvm > kvm: virtualization flags detected on this hardware: vmx tpr_shadow vnmi > flexpriority > loaded kvm module (kvm-83-125.el5) > kvm: emulating exchange as write > qemu-kvm[8932]: segfault at 00000000414c4ff0 rip 00000000004195e0 rsp > 00000000414c5008 error 6 Isn't there a core dump available? /var/log/core/ ? [...] --- Additional comment from lihuang on 2009-10-14 21:24:01 EDT --- I was unable to reproduce the segfault. bt from the core file : core.8870.1255374060.dump.1 Core was generated by `/usr/libexec/qemu-kvm -no-hpet -no-kvm-pit-reinjection -usbdevice tablet -rtc-t'. Program terminated with signal 11, Segmentation fault. [New process 8932] [New process 10156] [New process 10149] [New process 10148] [New process 9937] [New process 9931] [New process 9721] [New process 9523] [New process 9369] [New process 8934] [New process 8906] [New process 8870] #0 raw_pwrite_aligned (bs=0x162a27a0, offset=14002786304, buf=0x162a3200 "", count=16384) at block-raw-posix.c:250 250 { (gdb) bt #0 raw_pwrite_aligned (bs=0x162a27a0, offset=14002786304, buf=0x162a3200 "", count=16384) at block-raw-posix.c:250 #1 0x0000000000419711 in raw_pwrite (bs=0x162a27a0, offset=14002786304, buf=0x2aaac3bd61a0 "", count=20480) at block-raw-posix.c:405 #2 0x0000000000462551 in bdrv_pwrite (bs=0x162a27a0, offset=14002786304, buf1=0x2aaac3bd61a0, count1=20480) at block.c:825 #3 0x00000000004977a1 in update_refcount (bs=0x162a1c60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2541 #4 0x0000000000497811 in update_refcount (bs=0x162a1c60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #5 0x0000000000497811 in update_refcount (bs=0x162a1c60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #6 0x0000000000497811 in update_refcount (bs=0x162a1c60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #7 0x0000000000497811 in update_refcount (bs=0x162a1c60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #8 0x0000000000497811 in update_refcount (bs=0x162a1c60, offset=<value optimized out>, length=<value optimized out>, addend=-1) core.30972.1255354893.dump.1 Core was generated by `/usr/libexec/qemu-kvm -no-hpet -no-kvm-pit-reinjection -usbdevice tablet -rtc-t'. Program terminated with signal 11, Segmentation fault. [New process 31035] [New process 32628] [New process 32618] [New process 32617] [New process 32257] [New process 32229] [New process 32027] [New process 31868] [New process 31839] [New process 31037] [New process 30973] [New process 30972] #0 raw_pwrite_aligned (bs=0xaa9d7a0, offset=14002806784, buf=0xaa9e200 "", count=16384) at block-raw-posix.c:250 250 { (gdb) bt #0 raw_pwrite_aligned (bs=0xaa9d7a0, offset=14002806784, buf=0xaa9e200 "", count=16384) at block-raw-posix.c:250 #1 0x0000000000419711 in raw_pwrite (bs=0xaa9d7a0, offset=14002806784, buf=0x2aaab865e020 "", count=20480) at block-raw-posix.c:405 #2 0x0000000000462551 in bdrv_pwrite (bs=0xaa9d7a0, offset=14002806784, buf1=0x2aaab865e020, count1=20480) at block.c:825 #3 0x00000000004977a1 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2541 #4 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #5 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #6 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #7 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #8 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #9 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #10 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>, length=<value optimized out>, addend=-1) at block-qcow2.c:2563 #11 0x0000000000497811 in update_refcount (bs=0xaa9cc60, offset=<value optimized out>,
*** Bug 551387 has been marked as a duplicate of this bug. ***
*** Bug 549747 has been marked as a duplicate of this bug. ***
Verify bug in kvm-83-144.el5. steps : 1. create lvm --> [root@t199 Desktop]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert lvtest vgtest -wi-ao 3.00G 2. #qemu-img create -f qcow2 /dev/vgtest/lvtest 20G 3. start a vm with the host device . #/usr/libexec/qemu-kvm -m 2048 -smp 2 -drive file=vm.test,werror=stop -drive file=/dev/vgtest/lvtest,werror=stop,if=virtio,format=qcow2 -monitor stdio -vnc :1 -net nic,macaddr=00:21:04:58:92:D3 -net tap -usbdevice tablet 4. in guest. using dd to fill up the attached disk. # dd if=/dev/zero of=/dev/vda1 bs=1M 5. wait until vm pause on no space. 6. extend the lvm. #lvextend -L 4G /dev/vgtest/lvtest 7. in qemu monitor, input 'cont' to resume to paused vm. 8. repeat step 5~7 5times,enlarge the lvm's size 1G every time. result: no segfault vm run normally before the 'no space' pause. (can reproduce in kvm-83-105.el5_4.13,which doesn't have the patch. )
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0271.html