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Thu, 24 Mar 2022 05:59:19 -0700 (PDT) Received: from [192.168.100.42] ([82.142.12.150]) by smtp.gmail.com with ESMTPSA id v7-20020ac85787000000b002e1c8376517sm2335975qta.22.2022.03.24.05.59.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 24 Mar 2022 05:59:19 -0700 (PDT) Message-ID: <2d9e3abd-99de-dc56-c6bd-93e54cd22b8e@redhat.com> Date: Thu, 24 Mar 2022 13:59:16 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: hang in migration-test (s390 host) To: Peter Maydell , QEMU Developers References: From: Laurent Vivier In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lvivier@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=lvivier@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , =?UTF-8?Q?Alex_Benn=c3=a9e?= , "Dr. David Alan Gilbert" , Juan Quintela Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Perhaps Juan or Thomas can help too (added to cc) Is this a regression? It looks like a bug in QEMU as it doesn't move from cancelling to cancelled. Thanks, Laurent On 24/03/2022 12:19, Peter Maydell wrote: > Here's the hang in the migration-test process. It's in > the test_multifd_tcp_cancel() test. > > Here the status returned by the QEMU process is "cancelling", > and we are spinning forever waiting for a "cancelled" state > that never arrives. > > I can keep these stuck tests around for a day or so in case there's > further stuff you'd like me to check via gdb, but they > eat CPU on these hosts and prevent us running further CI jobs > (the lack of spare CPU on the box means the other CI jobs tend > to time out before the 1h mark) so I can't keep them indefinitely. > > -- PMM > > Process tree: > migration-test(2771497)─┬─qemu-system-i38(2772862) > ├─qemu-system-i38(2772869) > └─qemu-system-i38(2773014) > =========================================================== > PROCESS: 2771497 > gitlab-+ 2771497 2769521 10 Mar23 ? 01:51:09 > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/build/tests/qtest/migration-test > --tap -k > [New LWP 2771498] > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib/s390x-linux-gnu/libthread_db.so.1". > __libc_read (nbytes=1, buf=0x3ffd577abd7, fd=4) at > ../sysdeps/unix/sysv/linux/read.c:26 > 26 ../sysdeps/unix/sysv/linux/read.c: No such file or directory. > > Thread 2 (Thread 0x3ffb197f900 (LWP 2771498)): > #0 syscall () at ../sysdeps/unix/sysv/linux/s390/s390-64/syscall.S:37 > #1 0x000002aa00535c14 in qemu_futex_wait (val=, > f=) at > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/include/qemu/futex.h:29 > #2 qemu_event_wait (ev=ev@entry=0x2aa0056eb50 ) > at ../util/qemu-thread-posix.c:481 > #3 0x000002aa00541aca in call_rcu_thread (opaque=opaque@entry=0x0) at > ../util/rcu.c:261 > #4 0x000002aa00534c0a in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #5 0x000003ffb1c07e66 in start_thread (arg=0x3ffb197f900) at > pthread_create.c:477 > #6 0x000003ffb1afcbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 1 (Thread 0x3ffb1ff5430 (LWP 2771497)): > #0 __libc_read (nbytes=1, buf=0x3ffd577abd7, fd=4) at > ../sysdeps/unix/sysv/linux/read.c:26 > #1 __libc_read (fd=fd@entry=4, buf=buf@entry=0x3ffd577abd7, > nbytes=nbytes@entry=1) at ../sysdeps/unix/sysv/linux/read.c:24 > #2 0x000002aa00511bc4 in read (__nbytes=1, __buf=0x3ffd577abd7, > __fd=4) at /usr/include/s390x-linux-gnu/bits/unistd.h:44 > #3 qmp_fd_receive (fd=) at ../tests/qtest/libqtest.c:613 > #4 0x000002aa00511c6a in qtest_qmp_receive_dict (s=0x2aa00ea3110) at > ../tests/qtest/libqtest.c:648 > #5 qtest_qmp_receive (s=s@entry=0x2aa00ea3110) at ../tests/qtest/libqtest.c:636 > #6 0x000002aa00512554 in qtest_vqmp (s=s@entry=0x2aa00ea3110, > fmt=fmt@entry=0x2aa00548098 "{ 'execute': 'query-migrate' }", > ap=ap@entry=0x3ffd577ad80) at ../tests/qtest/libqtest.c:749 > #7 0x000002aa00510386 in wait_command (who=who@entry=0x2aa00ea3110, > command=command@entry=0x2aa00548098 "{ 'execute': 'query-migrate' }") > at ../tests/qtest/migration-helpers.c:63 > #8 0x000002aa00510498 in migrate_query (who=who@entry=0x2aa00ea3110) > at ../tests/qtest/migration-helpers.c:116 > #9 migrate_query_status (who=who@entry=0x2aa00ea3110) at > ../tests/qtest/migration-helpers.c:116 > #10 0x000002aa005106ac in check_migration_status (ungoals=0x0, > goal=0x2aa00547a10 "cancelled", who=0x2aa00ea3110) at > ../tests/qtest/migration-helpers.c:156 > #11 wait_for_migration_status (who=0x2aa00ea3110, goal= out>, ungoals=0x0) at ../tests/qtest/migration-helpers.c:156 > #12 0x000002aa0050fbc2 in test_multifd_tcp_cancel () at > ../tests/qtest/migration-test.c:1379 > #13 0x000003ffb1dfe608 in ?? () from /lib/s390x-linux-gnu/libglib-2.0.so.0 > #14 0x000003ffb1dfe392 in ?? () from /lib/s390x-linux-gnu/libglib-2.0.so.0 > #15 0x000003ffb1dfe392 in ?? () from /lib/s390x-linux-gnu/libglib-2.0.so.0 > #16 0x000003ffb1dfe392 in ?? () from /lib/s390x-linux-gnu/libglib-2.0.so.0 > #17 0x000003ffb1dfe392 in ?? () from /lib/s390x-linux-gnu/libglib-2.0.so.0 > #18 0x000003ffb1dfeada in g_test_run_suite () from > /lib/s390x-linux-gnu/libglib-2.0.so.0 > #19 0x000003ffb1dfeb10 in g_test_run () from > /lib/s390x-linux-gnu/libglib-2.0.so.0 > #20 0x000002aa0050cea8 in main (argc=, argv= out>) at ../tests/qtest/migration-test.c:1491 > [Inferior 1 (process 2771497) detached] > > =========================================================== > PROCESS: 2772862 > gitlab-+ 2772862 2771497 99 Mar23 ? 18:45:28 ./qemu-system-i386 > -qtest unix:/tmp/qtest-2771497.sock -qtest-log /dev/null -chardev > socket,path=/tmp/qtest-2771497.qmp,id=char0 -mon > chardev=char0,mode=control -display none -accel kvm -accel tcg -name > source,debug-threads=on -m 150M -serial > file:/tmp/migration-test-f6G71L/src_serial -drive > file=/tmp/migration-test-f6G71L/bootsect,format=raw -accel qtest > [New LWP 2772864] > [New LWP 2772866] > [New LWP 2772867] > [New LWP 2772915] > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib/s390x-linux-gnu/libthread_db.so.1". > 0x000003ff94ef1c9c in __ppoll (fds=0x2aa179a6f30, nfds=5, > timeout=, timeout@entry=0x3fff557b588, > sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 > 44 ../sysdeps/unix/sysv/linux/ppoll.c: No such file or directory. > > Thread 5 (Thread 0x3ff1b7f6900 (LWP 2772915)): > #0 futex_abstimed_wait_cancelable (private=0, abstime=0x0, clockid=0, > expected=0, futex_word=0x2aa1881f634) at > ../sysdeps/nptl/futex-internal.h:320 > #1 do_futex_wait (sem=sem@entry=0x2aa1881f630, abstime=0x0, > clockid=0) at sem_waitcommon.c:112 > #2 0x000003ff95011870 in __new_sem_wait_slow > (sem=sem@entry=0x2aa1881f630, abstime=0x0, clockid=0) at > sem_waitcommon.c:184 > #3 0x000003ff9501190e in __new_sem_wait (sem=sem@entry=0x2aa1881f630) > at sem_wait.c:42 > #4 0x000002aa165b1416 in qemu_sem_wait (sem=sem@entry=0x2aa1881f630) > at ../util/qemu-thread-posix.c:358 > #5 0x000002aa16023434 in multifd_send_sync_main (f=0x2aa17993760) at > ../migration/multifd.c:610 > #6 0x000002aa162a8f18 in ram_save_iterate (f=0x2aa17993760, > opaque=) at ../migration/ram.c:3049 > #7 0x000002aa1602bafc in qemu_savevm_state_iterate (f=0x2aa17993760, > postcopy=) at ../migration/savevm.c:1296 > #8 0x000002aa1601fe4e in migration_iteration_run (s=0x2aa17748010) at > ../migration/migration.c:3607 > #9 migration_thread (opaque=opaque@entry=0x2aa17748010) at > ../migration/migration.c:3838 > #10 0x000002aa165b05c2 in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #11 0x000003ff95007e66 in start_thread (arg=0x3ff1b7f6900) at > pthread_create.c:477 > #12 0x000003ff94efcbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 4 (Thread 0x3ff84d2f900 (LWP 2772867)): > #0 rcu_read_lock () at > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/include/qemu/rcu.h:87 > #1 rcu_read_auto_lock () at > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/include/qemu/rcu.h:170 > #2 memory_region_get_ram_ptr (mr=0x2aa17612220) at ../softmmu/memory.c:2319 > #3 0x000002aa1637abf0 in tlb_set_page_with_attrs > (cpu=cpu@entry=0x2aa179860a0, vaddr=vaddr@entry=52445184, > paddr=, attrs=..., prot=, prot@entry=7, > mmu_idx=2, size=4096) at ../accel/tcg/cputlb.c:1157 > #4 0x000002aa1620465e in handle_mmu_fault (size=, > mmu_idx=, is_write1=, addr= out>, cs=0x2aa179860a0) at ../target/i386/cpu.h:2157 > #5 x86_cpu_tlb_fill (cs=0x2aa179860a0, addr=, > size=, access_type=, mmu_idx= out>, probe=false, retaddr=4394827381568) at > ../target/i386/tcg/sysemu/excp_helper.c:432 > #6 0x000002aa16375cea in tlb_fill (cpu=0x2aa179860a0, addr= out>, size=, access_type=, > mmu_idx=, retaddr=4394827381568) at > ../accel/tcg/cputlb.c:1313 > #7 0x000002aa16376cd6 in load_helper (full_load=, > code_read=false, op=MO_8, retaddr=, oi=, > addr=52445184, env=0x2aa1798e970) at > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/include/exec/cpu-all.h:467 > #8 full_ldub_mmu (env=0x2aa1798e970, addr=, > oi=, retaddr=) at > ../accel/tcg/cputlb.c:2025 > #9 0x000003ff401ffbfa in code_gen_buffer () > #10 0x000002aa16369d0e in cpu_tb_exec (tb_exit=, > itb=, cpu=) at > ../accel/tcg/cpu-exec.c:357 > #11 cpu_loop_exec_tb (tb_exit=, last_tb= pointer>, tb=, cpu=) at > ../accel/tcg/cpu-exec.c:847 > #12 cpu_exec (cpu=) at ../accel/tcg/cpu-exec.c:1006 > #13 0x0000000000007000 in () > > Thread 3 (Thread 0x3ff85621900 (LWP 2772866)): > #0 0x000003ff94ef1b42 in __GI___poll (fds=0x3ff380032a0, nfds=3, > timeout=) at ../sysdeps/unix/sysv/linux/poll.c:29 > #1 0x000003ff975d4386 in () at /lib/s390x-linux-gnu/libglib-2.0.so.0 > #2 0x000003ff975d4790 in g_main_loop_run () at > /lib/s390x-linux-gnu/libglib-2.0.so.0 > #3 0x000002aa163bfa4e in iothread_run > (opaque=opaque@entry=0x2aa176ad000) at ../iothread.c:73 > #4 0x000002aa165b05c2 in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #5 0x000003ff95007e66 in start_thread (arg=0x3ff85621900) at > pthread_create.c:477 > #6 0x000003ff94efcbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 2 (Thread 0x3ff85fa4900 (LWP 2772864)): > #0 syscall () at ../sysdeps/unix/sysv/linux/s390/s390-64/syscall.S:37 > #1 0x000002aa165b15cc in qemu_futex_wait (val=, > f=) at > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/include/qemu/futex.h:29 > #2 qemu_event_wait (ev=ev@entry=0x2aa16f57e60 ) > at ../util/qemu-thread-posix.c:481 > #3 0x000002aa165b9e42 in call_rcu_thread (opaque=opaque@entry=0x0) at > ../util/rcu.c:261 > #4 0x000002aa165b05c2 in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #5 0x000003ff95007e66 in start_thread (arg=0x3ff85fa4900) at > pthread_create.c:477 > #6 0x000003ff94efcbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 1 (Thread 0x3ff983fe440 (LWP 2772862)): > #0 0x000003ff94ef1c9c in __ppoll (fds=0x2aa179a6f30, nfds=5, > timeout=, timeout@entry=0x3fff557b588, > sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 > #1 0x000002aa165d154a in ppoll (__ss=0x0, __timeout=0x3fff557b588, > __nfds=, __fds=) at > /usr/include/s390x-linux-gnu/bits/poll2.h:77 > #2 qemu_poll_ns (fds=, nfds=, > timeout=timeout@entry=6543045) at ../util/qemu-timer.c:348 > #3 0x000002aa165cd768 in os_host_main_loop_wait (timeout=6543045) at > ../util/main-loop.c:250 > #4 main_loop_wait (nonblocking=nonblocking@entry=0) at ../util/main-loop.c:531 > #5 0x000002aa15ffaa94 in qemu_main_loop () at ../softmmu/runstate.c:727 > #6 0x000002aa15fae7a0 in main (argc=, argv= out>, envp=) at ../softmmu/main.c:50 > [Inferior 1 (process 2772862) detached] > > =========================================================== > PROCESS: 2772869 > gitlab-+ 2772869 2771497 0 Mar23 ? 00:00:00 [qemu-system-i38] > /proc/2772869/exe: No such file or directory. > Could not attach to process. If your uid matches the uid of the target > process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try > again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf > warning: process 2772869 is a zombie - the process has already terminated > ptrace: Operation not permitted. > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/build/2772869: > No such file or directory. > > =========================================================== > PROCESS: 2773014 > gitlab-+ 2773014 2771497 0 Mar23 ? 00:00:02 ./qemu-system-i386 > -qtest unix:/tmp/qtest-2771497.sock -qtest-log /dev/null -chardev > socket,path=/tmp/qtest-2771497.qmp,id=char0 -mon > chardev=char0,mode=control -display none -accel kvm -accel tcg -name > target,debug-threads=on -m 150M -serial > file:/tmp/migration-test-f6G71L/dest_serial -incoming defer -drive > file=/tmp/migration-test-f6G71L/bootsect,format=raw -accel qtest > [New LWP 2773017] > [New LWP 2773018] > [New LWP 2773019] > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib/s390x-linux-gnu/libthread_db.so.1". > 0x000003ffa4671c9c in __ppoll (fds=0x2aa0333c020, nfds=6, > timeout=, timeout@entry=0x3ffedefb228, > sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 > 44 ../sysdeps/unix/sysv/linux/ppoll.c: No such file or directory. > > Thread 4 (Thread 0x3ff4ffff900 (LWP 2773019)): > #0 futex_wait_cancelable (private=0, expected=0, > futex_word=0x2aa0333af7c) at ../sysdeps/nptl/futex-internal.h:183 > #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, > mutex=0x2aa01f26f10 , cond=0x2aa0333af50) at > pthread_cond_wait.c:508 > #2 __pthread_cond_wait (cond=cond@entry=0x2aa0333af50, > mutex=mutex@entry=0x2aa01f26f10 ) at > pthread_cond_wait.c:638 > #3 0x000002aa015b0e56 in qemu_cond_wait_impl (cond=0x2aa0333af50, > mutex=0x2aa01f26f10 , file=0x2aa0162e3fc > "../softmmu/cpus.c", line=) at > ../util/qemu-thread-posix.c:195 > #4 0x000002aa00ff4436 in qemu_wait_io_event > (cpu=cpu@entry=0x2aa0331b0a0) at ../softmmu/cpus.c:424 > #5 0x000002aa013852e0 in mttcg_cpu_thread_fn > (arg=arg@entry=0x2aa0331b0a0) at > ../accel/tcg/tcg-accel-ops-mttcg.c:124 > #6 0x000002aa015b05c2 in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #7 0x000003ffa4787e66 in start_thread (arg=0x3ff4ffff900) at > pthread_create.c:477 > #8 0x000003ffa467cbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 3 (Thread 0x3ff54da1900 (LWP 2773018)): > #0 0x000003ffa4671b42 in __GI___poll (fds=0x3ff48003250, nfds=3, > timeout=) at ../sysdeps/unix/sysv/linux/poll.c:29 > #1 0x000003ffa6d54386 in () at /lib/s390x-linux-gnu/libglib-2.0.so.0 > #2 0x000003ffa6d54790 in g_main_loop_run () at > /lib/s390x-linux-gnu/libglib-2.0.so.0 > #3 0x000002aa013bfa4e in iothread_run > (opaque=opaque@entry=0x2aa03042000) at ../iothread.c:73 > #4 0x000002aa015b05c2 in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #5 0x000003ffa4787e66 in start_thread (arg=0x3ff54da1900) at > pthread_create.c:477 > #6 0x000003ffa467cbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 2 (Thread 0x3ff95724900 (LWP 2773017)): > #0 syscall () at ../sysdeps/unix/sysv/linux/s390/s390-64/syscall.S:37 > #1 0x000002aa015b15cc in qemu_futex_wait (val=, > f=) at > /home/gitlab-runner/builds/-LCfcJ2T/0/qemu-project/qemu/include/qemu/futex.h:29 > #2 qemu_event_wait (ev=ev@entry=0x2aa01f57e60 ) > at ../util/qemu-thread-posix.c:481 > #3 0x000002aa015b9e42 in call_rcu_thread (opaque=opaque@entry=0x0) at > ../util/rcu.c:261 > #4 0x000002aa015b05c2 in qemu_thread_start (args=) at > ../util/qemu-thread-posix.c:556 > #5 0x000003ffa4787e66 in start_thread (arg=0x3ff95724900) at > pthread_create.c:477 > #6 0x000003ffa467cbf6 in thread_start () at > ../sysdeps/unix/sysv/linux/s390/s390-64/clone.S:65 > > Thread 1 (Thread 0x3ffa7b7e440 (LWP 2773014)): > #0 0x000003ffa4671c9c in __ppoll (fds=0x2aa0333c020, nfds=6, > timeout=, timeout@entry=0x3ffedefb228, > sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 > #1 0x000002aa015d154a in ppoll (__ss=0x0, __timeout=0x3ffedefb228, > __nfds=, __fds=) at > /usr/include/s390x-linux-gnu/bits/poll2.h:77 > #2 qemu_poll_ns (fds=, nfds=, > timeout=timeout@entry=1000000000) at ../util/qemu-timer.c:348 > #3 0x000002aa015cd768 in os_host_main_loop_wait (timeout=1000000000) > at ../util/main-loop.c:250 > #4 main_loop_wait (nonblocking=nonblocking@entry=0) at ../util/main-loop.c:531 > #5 0x000002aa00ffaa94 in qemu_main_loop () at ../softmmu/runstate.c:727 > #6 0x000002aa00fae7a0 in main (argc=, argv= out>, envp=) at ../softmmu/main.c:50 > [Inferior 1 (process 2773014) detached] > > > -- PMM > > > >