Apologies if this has already been reported. On x86, xl create no longer works since 38cd0664a6bf. xl create gets wedges attempting to acquire the domain-userdata-lock a second time.
strace output: open("/var/lib/xen/userdata-l.0.00000000-0000-0000-0000-000000000000.domain-userdata-lock", O_RDWR|O_CREAT, 0666) = 9 fcntl(9, F_GETFD) = 0 fcntl(9, F_SETFD, FD_CLOEXEC) = 0 flock(9, LOCK_EX) = 0 fstat(9, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 stat("/var/lib/xen/userdata-l.0.00000000-0000-0000-0000-000000000000.domain-userdata-lock", {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 ioctl(5, _IOC(0, 0x50, 0x00, 0x30), 0x7ffe5c183870) = 0 ioctl(5, _IOC(0, 0x50, 0x00, 0x30), 0x7ffe5c183610) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_LOCKED, -1, 0) = 0x7fbfb6014000 madvise(0x7fbfb6014000, 8192, MADV_DONTFORK) = 0 ioctl(5, _IOC(0, 0x50, 0x00, 0x30), 0x7ffe5c1825f0) = -1 ENOSYS (Function not implemented) madvise(0x7fbfb6014000, 8192, MADV_DOFORK) = 0 munmap(0x7fbfb6014000, 8192) = 0 open("/var/lib/xen/userdata-l.0.00000000-0000-0000-0000-000000000000.domain-userdata-lock", O_RDWR|O_CREAT, 0666) = 10 fcntl(10, F_GETFD) = 0 fcntl(10, F_SETFD, FD_CLOEXEC) = 0 flock(10, LOCK_EX Stack from the first lock acquisition: Breakpoint 1, libxl__lock_domain_userdata (gc=0x7fffffffd910, domid=0) at libxl_internal.c:404 404 fd = open(lockfile, O_RDWR|O_CREAT, 0666); (gdb) bt #0 libxl__lock_domain_userdata (gc=0x7fffffffd910, domid=0) at libxl_internal.c:404 #1 0x00007ffff7907696 in libxl_set_memory_target (ctx=0x639050, domid=0, target_memkb=-8, relative=1, enforce=0) at libxl.c:4182 #2 0x0000000000411fa9 in freemem (domid=4294967295, b_info=0x7fffffffe060) at xl_cmdimpl.c:2716 #3 0x0000000000412dd7 in create_domain (dom_info=0x7fffffffe4b0) at xl_cmdimpl.c:2998 #4 0x000000000041a373 in main_create (argc=1, argv=0x7fffffffe658) at xl_cmdimpl.c:5530 #5 0x0000000000408eda in main (argc=2, argv=0x7fffffffe650) at xl.c:364 Stack from the deadlock: Breakpoint 1, libxl__lock_domain_userdata (gc=0x7fffffffd7b0, domid=0) at libxl_internal.c:404 404 fd = open(lockfile, O_RDWR|O_CREAT, 0666); (gdb) bt #0 libxl__lock_domain_userdata (gc=0x7fffffffd7b0, domid=0) at libxl_internal.c:404 #1 0x00007ffff790fa4a in libxl_retrieve_domain_configuration (ctx=0x639050, domid=0, d_config=0x7fffffffda00) at libxl.c:6654 #2 0x00007ffff79076d4 in libxl_set_memory_target (ctx=0x639050, domid=0, target_memkb=-8, relative=1, enforce=0) at libxl.c:4188 #3 0x0000000000411fa9 in freemem (domid=4294967295, b_info=0x7fffffffe060) at xl_cmdimpl.c:2716 #4 0x0000000000412dd7 in create_domain (dom_info=0x7fffffffe4b0) at xl_cmdimpl.c:2998 #5 0x000000000041a373 in main_create (argc=1, argv=0x7fffffffe658) at xl_cmdimpl.c:5530 #6 0x0000000000408eda in main (argc=2, argv=0x7fffffffe650) at xl.c:364 - Kyle _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel