Bug 1162989
| Summary: | qemu-kvm-rhev core dump when guest numa node hugepage size < host hugepage size | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | FuXiangChun <xfu> |
| Component: | qemu-kvm-rhev | Assignee: | Eduardo Habkost <ehabkost> |
| Status: | CLOSED DUPLICATE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.1 | CC: | hhuang, jmiao, juzhang, lcapitulino, linchen, michen, virt-maint, ypu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2014-11-12 15:22:52 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: | |||
Sorry,There are some redundant(repeat gdb) information in comment 0. This is only core trace information as below. (gdb) bt #0 0x00007ffff1a075e9 in raise () from /lib64/libc.so.6 #1 0x00007ffff1a08cf8 in abort () from /lib64/libc.so.6 #2 0x0000555555622eca in qemu_get_ram_block (addr=<optimized out>) at /usr/src/debug/qemu-2.1.2/exec.c:797 #3 0x0000555555625119 in qemu_get_ram_ptr (addr=18446744073709547520) at /usr/src/debug/qemu-2.1.2/exec.c:1512 #4 0x0000555555658ce7 in memory_region_get_ram_ptr (mr=mr@entry=0x555556192290) at /usr/src/debug/qemu-2.1.2/memory.c:1458 #5 0x00005555557627ec in host_memory_backend_memory_complete (uc=<optimized out>, errp=0x7fffffffdf90) at backends/hostmem.c:291 #6 0x0000555555736185 in object_add (type=<optimized out>, id=0x5555561904c0 "ram-node0", qdict=qdict@entry=0x555556190d50, v=0x555556190c50, errp=errp@entry=0x7fffffffdfe8) at qmp.c:630 #7 0x0000555555724174 in object_create (opts=<optimized out>, opaque=<optimized out>) at vl.c:2899 #8 0x000055555589079b in qemu_opts_foreach (list=<optimized out>, func=func@entry=0x555555723fd0 <object_create>, opaque=opaque@entry=0x0, abort_on_failure=abort_on_failure@entry=0) at util/qemu-option.c:1072 #9 0x000055555561d08c in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4240 I think this one has been fixed as part of the fix for bug 1147354. I can provide a brew build for testing. I just confirmed that the fix for bug 1147354 fixes this one. Closing as duplicate. *** This bug has been marked as a duplicate of bug 1147354 *** For reference, this is the error message that's expected after applying the fix for bug 1147354: # /usr/libexec/qemu-kvm -m 512 -object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,size=512M,id=ram-node0,host-nodes=0,policy=bind -numa node,nodeid=0,cpus=0-1,memdev=ram-node0 qemu-kvm: -object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,size=512M,id=ram-node0,host-nodes=0,policy=bind: memory size 0x20000000 must be equal to or larger than huge page size 0x40000000 |
Description of problem: First, add hugepagesz=1G default_hugepagesz=1G to host kernel line. make sure host support 1G hugepage. Then starting qemu-kvm process with "-object memory-backend-file,.....size=512M". size < 1G hugepage. qemu-kvm-rhev core dump. QE tested libvirt as well. libvirt show error message as below. error: internal error: process exited while connecting to monitor: Bad ram offset fffffffffffff000 Version-Release number of selected component (if applicable): 3.10.0-195.el7.x86_64 qemu-kvm-rhev-2.1.2-6.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.make sure host support 1G hugepage # cat /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages 1 2.starting qemu-kvm-rhev process with cli /usr/libexec/qemu-kvm -m 512 \ -object memory-backend-file,prealloc=yes,mem-path=/mnt/kvm_hugepage1/libvirt/qemu,size=512M,id=ram-node0,host-nodes=0,policy=bind \ -numa node,nodeid=0,cpus=0-1,memdev=ram-node0 \ 3. Actual results: (gdb) bt #0 0x00007ffff1a075e9 in raise () from /lib64/libc.so.6 #1 0x00007ffff1a08cf8 in abort () from /lib64/libc.so.6 #2 0x0000555555622eca in qemu_get_ram_block (addr=<optimized out>) at /usr/src/debug/qemu-2.1.2/exec.c:797 #3 0x0000555555625119 in qemu_get_ram_ptr (addr=18446744073709547520) at /usr/src/debug/qemu-2.1.2/exec.c:1512 #4 0x0000555555658ce7 in memory_region_get_ram_ptr (mr=mr@entry=0x555556192290) at /usr/src/debug/qemu-2.1.2/memory.c:1458 #5 0x00005555557627ec in host_memory_backend_memory_complete (uc=<optimized out>, errp=0x7fffffffdf90) at backends/hostmem.c:291 #6 0x0000555555736185 in object_add (type=<optimized out>, id=0x5555561904c0 "ram-node0", qdict=qdict@entry=0x555556190d50, v=0x555556190c50, errp=errp@entry=0x7fffffffdfe8) at qmp.c:630 #7 0x0000555555724174 in object_create (opts=<optimized out>, opaque=<optimized out>) at vl.c:2899 #8 0x000055555589079b in qemu_opts_foreach (list=<optimized out>, func=func@entry=0x555555723fd0 <object_create>, opaque=opaque@entry=0x0, abort_on_failure=abort_on_failure@entry=0) at util/qemu-option.c:1072 #9 0x000055555561d08c in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4240 (gdb) #0 0x00007ffff1a075e9 in raise () from /lib64/libc.so.6 #1 0x00007ffff1a08cf8 in abort () from /lib64/libc.so.6 #2 0x0000555555622eca in qemu_get_ram_block (addr=<optimized out>) at /usr/src/debug/qemu-2.1.2/exec.c:797 #3 0x0000555555625119 in qemu_get_ram_ptr (addr=18446744073709547520) at /usr/src/debug/qemu-2.1.2/exec.c:1512 #4 0x0000555555658ce7 in memory_region_get_ram_ptr (mr=mr@entry=0x555556192290) at /usr/src/debug/qemu-2.1.2/memory.c:1458 #5 0x00005555557627ec in host_memory_backend_memory_complete (uc=<optimized out>, errp=0x7fffffffdf90) at backends/hostmem.c:291 #6 0x0000555555736185 in object_add (type=<optimized out>, id=0x5555561904c0 "ram-node0", qdict=qdict@entry=0x555556190d50, v=0x555556190c50, errp=errp@entry=0x7fffffffdfe8) at qmp.c:630 #7 0x0000555555724174 in object_create (opts=<optimized out>, opaque=<optimized out>) at vl.c:2899 #8 0x000055555589079b in qemu_opts_foreach (list=<optimized out>, func=func@entry=0x555555723fd0 <object_create>, opaque=opaque@entry=0x0, abort_on_failure=abort_on_failure@entry=0) at util/qemu-option.c:1072 #9 0x000055555561d08c in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4240 (gdb) #0 0x00007ffff1a075e9 in raise () from /lib64/libc.so.6 #1 0x00007ffff1a08cf8 in abort () from /lib64/libc.so.6 #2 0x0000555555622eca in qemu_get_ram_block (addr=<optimized out>) at /usr/src/debug/qemu-2.1.2/exec.c:797 #3 0x0000555555625119 in qemu_get_ram_ptr (addr=18446744073709547520) at /usr/src/debug/qemu-2.1.2/exec.c:1512 #4 0x0000555555658ce7 in memory_region_get_ram_ptr (mr=mr@entry=0x555556192290) at /usr/src/debug/qemu-2.1.2/memory.c:1458 #5 0x00005555557627ec in host_memory_backend_memory_complete (uc=<optimized out>, errp=0x7fffffffdf90) at backends/hostmem.c:291 #6 0x0000555555736185 in object_add (type=<optimized out>, id=0x5555561904c0 "ram-node0", qdict=qdict@entry=0x555556190d50, v=0x555556190c50, errp=errp@entry=0x7fffffffdfe8) at qmp.c:630 #7 0x0000555555724174 in object_create (opts=<optimized out>, opaque=<optimized out>) at vl.c:2899 #8 0x000055555589079b in qemu_opts_foreach (list=<optimized out>, func=func@entry=0x555555723fd0 <object_create>, opaque=opaque@entry=0x0, abort_on_failure=abort_on_failure@entry=0) at util/qemu-option.c:1072 #9 0x000055555561d08c in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4240 (gdb) #0 0x00007ffff1a075e9 in raise () from /lib64/libc.so.6 #1 0x00007ffff1a08cf8 in abort () from /lib64/libc.so.6 #2 0x0000555555622eca in qemu_get_ram_block (addr=<optimized out>) at /usr/src/debug/qemu-2.1.2/exec.c:797 #3 0x0000555555625119 in qemu_get_ram_ptr (addr=18446744073709547520) at /usr/src/debug/qemu-2.1.2/exec.c:1512 #4 0x0000555555658ce7 in memory_region_get_ram_ptr (mr=mr@entry=0x555556192290) at /usr/src/debug/qemu-2.1.2/memory.c:1458 #5 0x00005555557627ec in host_memory_backend_memory_complete (uc=<optimized out>, errp=0x7fffffffdf90) at backends/hostmem.c:291 #6 0x0000555555736185 in object_add (type=<optimized out>, id=0x5555561904c0 "ram-node0", qdict=qdict@entry=0x555556190d50, v=0x555556190c50, errp=errp@entry=0x7fffffffdfe8) at qmp.c:630 #7 0x0000555555724174 in object_create (opts=<optimized out>, opaque=<optimized out>) at vl.c:2899 #8 0x000055555589079b in qemu_opts_foreach (list=<optimized out>, func=func@entry=0x555555723fd0 <object_create>, opaque=opaque@entry=0x0, abort_on_failure=abort_on_failure@entry=0) at util/qemu-option.c:1072 #9 0x000055555561d08c in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4240 Expected results: qemu-kvm-rhev show correctly and friendly error message. shouldn't core dump. Additional info: libivrt hit the same issue.