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Network driver domain broken

To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>

From: Andrea Stevanato <Andrea.Stevanato@xxxxxxxxxxxxxxx>

Date: Thu, 3 Mar 2022 14:54:27 +0000

Accept-language: en-US

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Cc: "roger.pau@xxxxxxxxxx" <roger.pau@xxxxxxxxxx>, "ian.jackson@xxxxxxxxxxxxx" <ian.jackson@xxxxxxxxxxxxx>, "wl@xxxxxxx" <wl@xxxxxxx>

Delivery-date: Thu, 03 Mar 2022 14:54:36 +0000

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

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Thread-index: AQHYLw1qzygpamMN3EyejpXz6IEhzA==

Thread-topic: Network driver domain broken

Hi all, according to the conversation that I had with royger, aa67b97ed34 broke the driver domain support. What I'm trying to do is to setup networking between guests using driver domain. Therefore, the guest (driver) has been started with the following cfg. name = "guest0" kernel = "/media/sd-mmcblk0p1/Image" ramdisk = "/media/sd-mmcblk0p1/rootfs.cpio.gz" extra = "console=hvc0 rdinit=/sbin/init root=/dev/ram0" memory = 1024 vcpus = 2 driver_domain = 1 On guest0 I created the bridge, assigned a static IP and started the udhcpd on xenbr0 interface. While the second guest has been started with the following cfg: name = "guest1" kernel = "/media/sd-mmcblk0p1/Image" ramdisk = "/media/sd-mmcblk0p1/rootfs.cpio.gz" extra = "console=hvc0 rdinit=/sbin/init root=/dev/ram0" memory = 1024 vcpus = 2 vcpus = 2 vif = [ 'bridge=xenbr0, backend=guest0' ] Follows the result of strace xl devd: # strace xl devd execve("/usr/sbin/xl", ["xl", "devd"], 0xffffdf0420c8 /* 13 vars */) = 0 brk(NULL) = 0xaaaaeaf3b000 faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=7840, ...}) = 0 mmap(NULL, 7840, PROT_READ, MAP_PRIVATE, 3, 0) = 0xffff9f45e000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxlutil.so.4.14", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\0200\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=68168, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9f45c000 mmap(NULL, 131784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f410000 mprotect(0xffff9f41f000, 65536, PROT_NONE) = 0 mmap(0xffff9f42f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xffff9f42f000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenlight.so.4.14", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\16\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=861848, ...}) = 0 mmap(NULL, 925752, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f32d000 mprotect(0xffff9f3fa000, 61440, PROT_NONE) = 0 mmap(0xffff9f409000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xcc000) = 0xffff9f409000 mmap(0xffff9f40f000, 56, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff9f40f000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxentoollog.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0P\r\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=10368, ...}) = 0 mmap(NULL, 73904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f31a000 mprotect(0xffff9f31c000, 61440, PROT_NONE) = 0 mmap(0xffff9f32b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xffff9f32b000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libyajl.so.2", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320\22\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=38728, ...}) = 0 mmap(NULL, 102416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f300000 mprotect(0xffff9f309000, 61440, PROT_NONE) = 0 mmap(0xffff9f318000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0xffff9f318000 close(3) = 0 openat(AT_FDCWD, "/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\300j\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=113184, ...}) = 0 mmap(NULL, 192872, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f2d0000 mprotect(0xffff9f2ea000, 65536, PROT_NONE) = 0 mmap(0xffff9f2fa000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a000) = 0xffff9f2fa000 mmap(0xffff9f2fc000, 12648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff9f2fc000 close(3) = 0 openat(AT_FDCWD, "/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320I\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1428872, ...}) = 0 mmap(NULL, 1502000, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f161000 mprotect(0xffff9f2b8000, 61440, PROT_NONE) = 0 mmap(0xffff9f2c7000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x156000) = 0xffff9f2c7000 mmap(0xffff9f2cd000, 11056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff9f2cd000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenevtchn.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0@\f\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=10240, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9f45a000 mmap(NULL, 73856, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f14e000 mprotect(0xffff9f150000, 61440, PROT_NONE) = 0 mmap(0xffff9f15f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xffff9f15f000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenctrl.so.4.14", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000\203\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=154752, ...}) = 0 mmap(NULL, 218504, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f118000 mprotect(0xffff9f13d000, 61440, PROT_NONE) = 0 mmap(0xffff9f14c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0xffff9f14c000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenguest.so.4.14", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0PB\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=77248, ...}) = 0 mmap(NULL, 140880, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f0f5000 mprotect(0xffff9f107000, 61440, PROT_NONE) = 0 mmap(0xffff9f116000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0xffff9f116000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenhypfs.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\300\16\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14432, ...}) = 0 mmap(NULL, 78048, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f0e1000 mprotect(0xffff9f0e3000, 65536, PROT_NONE) = 0 mmap(0xffff9f0f3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9f0f3000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenstore.so.3.0", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0 $\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=31176, ...}) = 0 mmap(NULL, 107088, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f0c6000 mprotect(0xffff9f0cc000, 65536, PROT_NONE) = 0 mmap(0xffff9f0dc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff9f0dc000 mmap(0xffff9f0de000, 8784, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff9f0de000 close(3) = 0 openat(AT_FDCWD, "/lib/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0@\20\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14296, ...}) = 0 mmap(NULL, 77920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f0b2000 mprotect(0xffff9f0b5000, 61440, PROT_NONE) = 0 mmap(0xffff9f0c4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9f0c4000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxentoolcore.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0 \10\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=6104, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9f458000 mmap(NULL, 69768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f0a0000 mprotect(0xffff9f0a1000, 61440, PROT_NONE) = 0 mmap(0xffff9f0b0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xffff9f0b0000 close(3) = 0 openat(AT_FDCWD, "/lib/libutil.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\21\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14296, ...}) = 0 mmap(NULL, 77840, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f08c000 mprotect(0xffff9f08e000, 65536, PROT_NONE) = 0 mmap(0xffff9f09e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9f09e000 close(3) = 0 openat(AT_FDCWD, "/lib/libuuid.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000\30\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=30680, ...}) = 0 mmap(NULL, 94240, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9f074000 mprotect(0xffff9f07a000, 65536, PROT_NONE) = 0 mmap(0xffff9f08a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff9f08a000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libnl-route-3.so.200", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\200\327\1\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=536688, ...}) = 0 mmap(NULL, 609024, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9efdf000 mprotect(0xffff9f05a000, 65536, PROT_NONE) = 0 mmap(0xffff9f06a000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7b000) = 0xffff9f06a000 mmap(0xffff9f072000, 6912, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff9f072000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libnl-3.so.200", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\360\221\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=141304, ...}) = 0 mmap(NULL, 205192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9efac000 mprotect(0xffff9efcd000, 61440, PROT_NONE) = 0 mmap(0xffff9efdc000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x20000) = 0xffff9efdc000 close(3) = 0 openat(AT_FDCWD, "/lib/librt.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\0#\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=31032, ...}) = 0 mmap(NULL, 94568, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef94000 mprotect(0xffff9ef9b000, 61440, PROT_NONE) = 0 mmap(0xffff9efaa000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff9efaa000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libfdt.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000#\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=38800, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9f456000 mmap(NULL, 102416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef7a000 mprotect(0xffff9ef83000, 61440, PROT_NONE) = 0 mmap(0xffff9ef92000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0xffff9ef92000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxengnttab.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\20\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14368, ...}) = 0 mmap(NULL, 77984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef66000 mprotect(0xffff9ef69000, 61440, PROT_NONE) = 0 mmap(0xffff9ef78000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9ef78000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxencall.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320\17\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14400, ...}) = 0 mmap(NULL, 78064, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef52000 mprotect(0xffff9ef55000, 61440, PROT_NONE) = 0 mmap(0xffff9ef64000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9ef64000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxenforeignmemory.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000\16\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14392, ...}) = 0 mmap(NULL, 78000, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef3e000 mprotect(0xffff9ef40000, 65536, PROT_NONE) = 0 mmap(0xffff9ef50000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9ef50000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libxendevicemodel.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\23\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=14400, ...}) = 0 mmap(NULL, 78008, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef2a000 mprotect(0xffff9ef2d000, 61440, PROT_NONE) = 0 mmap(0xffff9ef3c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff9ef3c000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/libbz2.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320\27\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=70472, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9f454000 mmap(NULL, 134160, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ef09000 mprotect(0xffff9ef19000, 61440, PROT_NONE) = 0 mmap(0xffff9ef28000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xffff9ef28000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/liblzma.so.5", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\3403\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=153496, ...}) = 0 mmap(NULL, 217104, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9eed3000 mprotect(0xffff9eef7000, 65536, PROT_NONE) = 0 mmap(0xffff9ef07000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0xffff9ef07000 close(3) = 0 openat(AT_FDCWD, "/usr/lib/liblzo2.so.2", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320&\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=120648, ...}) = 0 mmap(NULL, 184336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9eea5000 mprotect(0xffff9eec2000, 61440, PROT_NONE) = 0 mmap(0xffff9eed1000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c000) = 0xffff9eed1000 close(3) = 0 openat(AT_FDCWD, "/lib/libz.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\360%\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=92056, ...}) = 0 mmap(NULL, 155664, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9ee7e000 mprotect(0xffff9ee93000, 65536, PROT_NONE) = 0 mmap(0xffff9eea3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0xffff9eea3000 close(3) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9ee7c000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff9ee7a000 mprotect(0xffff9f2c7000, 12288, PROT_READ) = 0 mprotect(0xffff9eea3000, 4096, PROT_READ) = 0 mprotect(0xffff9eed1000, 4096, PROT_READ) = 0 mprotect(0xffff9f2fa000, 4096, PROT_READ) = 0 mprotect(0xffff9ef07000, 4096, PROT_READ) = 0 mprotect(0xffff9ef28000, 4096, PROT_READ) = 0 mprotect(0xffff9f32b000, 4096, PROT_READ) = 0 mprotect(0xffff9f0b0000, 4096, PROT_READ) = 0 mprotect(0xffff9ef64000, 4096, PROT_READ) = 0 mprotect(0xffff9ef3c000, 4096, PROT_READ) = 0 mprotect(0xffff9ef50000, 4096, PROT_READ) = 0 mprotect(0xffff9ef78000, 4096, PROT_READ) = 0 mprotect(0xffff9ef92000, 4096, PROT_READ) = 0 mprotect(0xffff9efaa000, 4096, PROT_READ) = 0 mprotect(0xffff9efdc000, 8192, PROT_READ) = 0 mprotect(0xffff9f06a000, 16384, PROT_READ) = 0 mprotect(0xffff9f08a000, 4096, PROT_READ) = 0 mprotect(0xffff9f09e000, 4096, PROT_READ) = 0 mprotect(0xffff9f0c4000, 4096, PROT_READ) = 0 mprotect(0xffff9f0dc000, 4096, PROT_READ) = 0 mprotect(0xffff9f0f3000, 4096, PROT_READ) = 0 mprotect(0xffff9f15f000, 4096, PROT_READ) = 0 mprotect(0xffff9f14c000, 4096, PROT_READ) = 0 mprotect(0xffff9f116000, 4096, PROT_READ) = 0 mprotect(0xffff9f318000, 4096, PROT_READ) = 0 mprotect(0xffff9f409000, 8192, PROT_READ) = 0 mprotect(0xffff9f42f000, 4096, PROT_READ) = 0 mprotect(0xaaaabaa10000, 4096, PROT_READ) = 0 mprotect(0xffff9f463000, 4096, PROT_READ) = 0 munmap(0xffff9f45e000, 7840) = 0 set_tid_address(0xffff9ee7a0e0) = 813 set_robust_list(0xffff9ee7a0f0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0xffff9f2d6570, sa_mask=[], sa_flags=SA_SIGINFO}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0xffff9f2d6630, sa_mask=[], sa_flags=SA_RESTART|SA_SIGINFO}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 brk(NULL) = 0xaaaaeaf3b000 brk(0xaaaaeaf5c000) = 0xaaaaeaf5c000 newfstatat(AT_FDCWD, "/etc/libnl/classid", {st_mode=S_IFREG|0644, st_size=1130, ...}, 0) = 0 openat(AT_FDCWD, "/etc/libnl/classid", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=1130, ...}) = 0 read(3, "################################"..., 4096) = 1130 read(3, "", 4096) = 0 close(3) = 0 ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0 pipe2([3, 4], 0) = 0 fcntl(3, F_GETFL) = 0 (flags O_RDONLY) fcntl(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0 fcntl(4, F_GETFL) = 0x1 (flags O_WRONLY) fcntl(4, F_SETFL, O_WRONLY|O_NONBLOCK) = 0 openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 5 openat(AT_FDCWD, "/dev/xen/hypercall", O_RDWR|O_CLOEXEC) = 6 openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 7 ioctl(7, _IOC(_IOC_NONE, 0x50, 0xff, 0), 0) = -1 ENOTTY (Inappropriate ioctl for device) openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 8 openat(AT_FDCWD, "/dev/xen/hypercall", O_RDWR|O_CLOEXEC) = 9 openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 10 ioctl(10, _IOC(_IOC_NONE, 0x50, 0x5, 0x10), 0xffffe6e417f0) = 0 newfstatat(AT_FDCWD, "/var/run/xenstored/socket", {st_mode=S_IFSOCK|0600, st_size=0, ...}, 0) = 0 socket(AF_UNIX, SOCK_STREAM, 0) = 11 fcntl(11, F_GETFD) = 0 fcntl(11, F_SETFD, FD_CLOEXEC) = 0 connect(11, {sa_family=AF_UNIX, sun_path="/var/run/xenstored/socket"}, 110) = -1 ECONNREFUSED (Connection refused) close(11) = 0 faccessat(AT_FDCWD, "/dev/xen/xenbus", F_OK) = 0 newfstatat(AT_FDCWD, "/dev/xen/xenbus", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xa, 0x3e), ...}, 0) = 0 openat(AT_FDCWD, "/dev/xen/xenbus", O_RDWR) = 11 openat(AT_FDCWD, "/etc/xen/xl.conf", O_RDONLY) = 12 fstat(12, {st_mode=S_IFREG|0644, st_size=1602, ...}) = 0 fstat(12, {st_mode=S_IFREG|0644, st_size=1602, ...}) = 0 read(12, "## Global XL config file ##\n\n# S"..., 4096) = 1602 close(12) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 262158 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 6, 0) = 0xffff9f45f000 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 4096 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41850) = 0 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41820) = -1 EPERM (Operation not permitted) ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41b40) = -1 EPERM (Operation not permitted) write(2, "libxl: ", 7libxl: ) = 7 write(2, "error: ", 7error: ) = 7 write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus) = 87 write(2, "\n", 1 ) = 1 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41b40) = -1 EPERM (Operation not permitted) write(2, "libxl: ", 7libxl: ) = 7 write(2, "error: ", 7error: ) = 7 write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus) = 87 write(2, "\n", 1 ) = 1 ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41b40) = -1 EPERM (Operation not permitted) write(2, "libxl: ", 7libxl: ) = 7 write(2, "error: ", 7error: ) = 7 write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus) = 87 write(2, "\n", 1 ) = 1 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xffff9ee7a0e0) = 814 wait4(814, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 814 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=814, si_uid=0, si_status=0, si_utime=2, si_stime=2} --- close(6) = 0 close(5) = 0 munmap(0xffff9f45f000, 4096) = 0 close(7) = 0 close(10) = 0 close(9) = 0 close(8) = 0 close(11) = 0 close(3) = 0 close(4) = 0 exit_group(0) = ? +++ exited with 0 +++ royger told me that it is a BUG and not an issue with my setup. Therefore here I am. Cheers, Andrea

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