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Re: Network driver domain broken

  • To: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Jason Andryuk <jandryuk@xxxxxxxxx>
  • From: Andrea Stevanato <andrea.stevanato@xxxxxxxxxxxxxxx>
  • Date: Fri, 4 Mar 2022 13:05:55 +0100
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  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "wl@xxxxxxx" <wl@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>
  • Delivery-date: Fri, 04 Mar 2022 12:06:08 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 3/4/2022 12:52 PM, Roger Pau Monné wrote:

On Thu, Mar 03, 2022 at 01:08:31PM -0500, Jason Andryuk wrote:

On Thu, Mar 3, 2022 at 11:34 AM Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:


On Thu, Mar 03, 2022 at 05:01:23PM +0100, Andrea Stevanato wrote:

On 03/03/2022 15:54, Andrea Stevanato wrote:

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



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} ---


xl devd is daemonizing, but strace is only following the first
process.  Use `strace xl devd -F` to prevent the daemonizing (or
`strace -f xl devd` to follow children).


Or as a first step try to see what kind of messages you get from `xl
devd -F` when trying to attach a device using the driver domain.


Nothing has changed. On guest0 (the driver domain):

# xl devd -F
libxl: error: libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus libxl: error: libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus libxl: error: libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus 
[  696.805619] xenbr0: port 1(vif2.0) entered blocking state
[  696.810334] xenbr0: port 1(vif2.0) entered disabled state
[  696.824518] device vif2.0 entered promiscuous mode

While on dom0:

# xl network-list guest1
Idx BE Mac Addr.         handle state evt-ch   tx-/rx-ring-ref BE-path
0 1 00:16:3e:18:52:ac 0 6 -1 -1/-1 /local/domain/1/backend/vif/2/0 

The same with using strace gives the following output:

# strace xl devd -F
execve("/usr/sbin/xl", ["xl", "devd", "-F"], 0xffffeed242a0 /* 13 vars */) = 0 
brk(NULL)                               = 0xaaab092a8000
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) = 0xffff986e2000
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) = 0xffff986e0000 mmap(NULL, 131784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff98694000 
mprotect(0xffff986a3000, 65536, PROT_NONE) = 0
mmap(0xffff986b3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xffff986b3000 
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) = 0xffff985b1000 
mprotect(0xffff9867e000, 61440, PROT_NONE) = 0
mmap(0xffff9868d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xcc000) = 0xffff9868d000 mmap(0xffff98693000, 56, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff98693000 
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) = 0xffff9859e000 
mprotect(0xffff985a0000, 61440, PROT_NONE) = 0
mmap(0xffff985af000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xffff985af000 
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) = 0xffff98584000 
mprotect(0xffff9858d000, 61440, PROT_NONE) = 0
mmap(0xffff9859c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0xffff9859c000 
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) = 0xffff98554000 
mprotect(0xffff9856e000, 65536, PROT_NONE) = 0
mmap(0xffff9857e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a000) = 0xffff9857e000 mmap(0xffff98580000, 12648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff98580000 
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) = 0xffff983e5000 
mprotect(0xffff9853c000, 61440, PROT_NONE) = 0
mmap(0xffff9854b000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x156000) = 0xffff9854b000 mmap(0xffff98551000, 11056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff98551000 
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) = 0xffff986de000 mmap(NULL, 73856, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff983d2000 
mprotect(0xffff983d4000, 61440, PROT_NONE) = 0
mmap(0xffff983e3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xffff983e3000 
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) = 0xffff9839c000 
mprotect(0xffff983c1000, 61440, PROT_NONE) = 0
mmap(0xffff983d0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0xffff983d0000 
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) = 0xffff98379000 
mprotect(0xffff9838b000, 61440, PROT_NONE) = 0
mmap(0xffff9839a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0xffff9839a000 
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) = 0xffff98365000 
mprotect(0xffff98367000, 65536, PROT_NONE) = 0
mmap(0xffff98377000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff98377000 
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) = 0xffff9834a000 
mprotect(0xffff98350000, 65536, PROT_NONE) = 0
mmap(0xffff98360000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff98360000 mmap(0xffff98362000, 8784, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff98362000 
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) = 0xffff98336000 
mprotect(0xffff98339000, 61440, PROT_NONE) = 0
mmap(0xffff98348000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff98348000 
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) = 0xffff986dc000 mmap(NULL, 69768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff98324000 
mprotect(0xffff98325000, 61440, PROT_NONE) = 0
mmap(0xffff98334000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xffff98334000 
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) = 0xffff98310000 
mprotect(0xffff98312000, 65536, PROT_NONE) = 0
mmap(0xffff98322000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff98322000 
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) = 0xffff982f8000 
mprotect(0xffff982fe000, 65536, PROT_NONE) = 0
mmap(0xffff9830e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff9830e000 
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) = 0xffff98263000 
mprotect(0xffff982de000, 65536, PROT_NONE) = 0
mmap(0xffff982ee000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7b000) = 0xffff982ee000 mmap(0xffff982f6000, 6912, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff982f6000 
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) = 0xffff98230000 
mprotect(0xffff98251000, 61440, PROT_NONE) = 0
mmap(0xffff98260000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x20000) = 0xffff98260000 
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) = 0xffff98218000 
mprotect(0xffff9821f000, 61440, PROT_NONE) = 0
mmap(0xffff9822e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff9822e000 
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) = 0xffff986da000 mmap(NULL, 102416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff981fe000 
mprotect(0xffff98207000, 61440, PROT_NONE) = 0
mmap(0xffff98216000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0xffff98216000 
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) = 0xffff981ea000 
mprotect(0xffff981ed000, 61440, PROT_NONE) = 0
mmap(0xffff981fc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff981fc000 
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) = 0xffff981d6000 
mprotect(0xffff981d9000, 61440, PROT_NONE) = 0
mmap(0xffff981e8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff981e8000 
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) = 0xffff981c2000 
mprotect(0xffff981c4000, 65536, PROT_NONE) = 0
mmap(0xffff981d4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff981d4000 
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) = 0xffff981ae000 
mprotect(0xffff981b1000, 61440, PROT_NONE) = 0
mmap(0xffff981c0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff981c0000 
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) = 0xffff986d8000 mmap(NULL, 134160, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff9818d000 
mprotect(0xffff9819d000, 61440, PROT_NONE) = 0
mmap(0xffff981ac000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xffff981ac000 
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) = 0xffff98157000 
mprotect(0xffff9817b000, 65536, PROT_NONE) = 0
mmap(0xffff9818b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0xffff9818b000 
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) = 0xffff98129000 
mprotect(0xffff98146000, 61440, PROT_NONE) = 0
mmap(0xffff98155000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c000) = 0xffff98155000 
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) = 0xffff98102000 
mprotect(0xffff98117000, 65536, PROT_NONE) = 0
mmap(0xffff98127000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0xffff98127000 
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff98100000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff980fe000 
mprotect(0xffff9854b000, 12288, PROT_READ) = 0
mprotect(0xffff98127000, 4096, PROT_READ) = 0
mprotect(0xffff98155000, 4096, PROT_READ) = 0
mprotect(0xffff9857e000, 4096, PROT_READ) = 0
mprotect(0xffff9818b000, 4096, PROT_READ) = 0
mprotect(0xffff981ac000, 4096, PROT_READ) = 0
mprotect(0xffff985af000, 4096, PROT_READ) = 0
mprotect(0xffff98334000, 4096, PROT_READ) = 0
mprotect(0xffff981e8000, 4096, PROT_READ) = 0
mprotect(0xffff981c0000, 4096, PROT_READ) = 0
mprotect(0xffff981d4000, 4096, PROT_READ) = 0
mprotect(0xffff981fc000, 4096, PROT_READ) = 0
mprotect(0xffff98216000, 4096, PROT_READ) = 0
mprotect(0xffff9822e000, 4096, PROT_READ) = 0
mprotect(0xffff98260000, 8192, PROT_READ) = 0
mprotect(0xffff982ee000, 16384, PROT_READ) = 0
mprotect(0xffff9830e000, 4096, PROT_READ) = 0
mprotect(0xffff98322000, 4096, PROT_READ) = 0
mprotect(0xffff98348000, 4096, PROT_READ) = 0
mprotect(0xffff98360000, 4096, PROT_READ) = 0
mprotect(0xffff98377000, 4096, PROT_READ) = 0
mprotect(0xffff983e3000, 4096, PROT_READ) = 0
mprotect(0xffff983d0000, 4096, PROT_READ) = 0
mprotect(0xffff9839a000, 4096, PROT_READ) = 0
mprotect(0xffff9859c000, 4096, PROT_READ) = 0
mprotect(0xffff9868d000, 8192, PROT_READ) = 0
mprotect(0xffff986b3000, 4096, PROT_READ) = 0
mprotect(0xaaaaceff0000, 4096, PROT_READ) = 0
mprotect(0xffff986e7000, 4096, PROT_READ) = 0
munmap(0xffff986e2000, 7840)            = 0
set_tid_address(0xffff980fe0e0)         = 882
set_robust_list(0xffff980fe0f0, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0xffff9855a570, sa_mask=[], sa_flags=SA_SIGINFO}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0xffff9855a630, 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)                               = 0xaaab092a8000
brk(0xaaab092c9000)                     = 0xaaab092c9000
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), 0xffffd0b60960) = 0
newfstatat(AT_FDCWD, "/var/run/xenstored/socket", 0xffffd0b60d90, 0) = -1 ENOENT (No such file or directory) 
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), 0xffffd0b609c0) = 262158
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 6, 0) = 0xffff986e3000
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 4096
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b609c0) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b60990) = -1 EPERM (Operation not permitted) ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffd0b60cb0) = -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), 0xffffd0b60cb0) = -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), 0xffffd0b60cb0) = -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
pipe2([12, 13], 0)                      = 0
fcntl(12, F_GETFL)                      = 0 (flags O_RDONLY)
fcntl(12, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
fcntl(13, F_GETFL)                      = 0x1 (flags O_WRONLY)
fcntl(13, F_SETFL, O_WRONLY|O_NONBLOCK) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0\6\0\0\0", 16) = 16
write(11, "domid\0", 6)                 = 6
read(11, "\2\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0", 16) = 16
read(11, "1", 1)                        = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 
pipe2([14, 15], 0)                      = 0
futex(0xffff98349048, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
mmap(NULL, 141168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xffff980db000 
mprotect(0xffff980dc000, 137072, PROT_READ|PROT_WRITE) = 0
rt_sigprocmask(SIG_BLOCK, ~[], ~[KILL STOP RTMIN RT_1], 8) = 0
clone(child_stack=0xffff980fc0e0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[883], tls=0xffff980fd000, child_tidptr=0xffff980fc940) = 883 
rt_sigprocmask(SIG_SETMASK, ~[KILL STOP RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\4\0\0\0\0\0\0\0\0\0\0\0\34\0\0\0", 16) = 16
write(11, "/local/domain/1/backend\0", 24) = 24
write(11, "3/0\0", 4)                   = 4
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\1\0\0\0\0\0\0\0\0\0\0\0\30\0\0\0", 16) = 16
write(11, "/local/domain/1/backend\0", 24) = 24
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) 
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\1\0\0\0\0\0\0\0\0\0\0\0\34\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif\0", 28) = 28
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) 
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\1\0\0\0\0\0\0\0\0\0\0\0\36\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2\0", 30) = 30
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
futex(0xaaab092a92e0, FUTEX_WAKE_PRIVATE, 1) = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0'\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 39) = 39
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) 
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\n\0\0\0\0\0\0\0\0\0\0\0\2\0\0\0", 16) = 16
write(11, "1\0", 2)                     = 2
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\n\0\0\0\0\0\0\0\0\0\0\0\2\0\0\0", 16) = 16
write(11, "1\0", 2)                     = 2
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\4\0\0\0\0\0\0\0\0\0\0\0*\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
write(11, "2/1\0", 4)                   = 4
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0'\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 39) = 39
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=736000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=719257893}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=703000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=692405877}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=675000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=652580293}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=628000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=626201831}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=608000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=606705200}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=587000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=579627984}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0'\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 39) = 39
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=446000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=402461923}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0'\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 39) = 39
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 
read(14, "/", 1)                        = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=173000000}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=9, tv_nsec=146785969}) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0'\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 39) = 39
futex(0xaaab092a93b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 
read(14, "/", 1)                        = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0&\0\0\0", 16) = 16
write(11, "/local/domain/1/backend/vif/2/0/"..., 38) = 38
futex(0xaaab092a93bc, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab092a9360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, {tv_sec=9, tv_nsec=13000000}, NULL, 0 


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.


Just a bit more context: AFAICT the calls to libxl_cpu_bitmap_alloc in
parse_global_config will prevent xl from being usable on anything
different than the control domain (due to sysctl only available to
privileged domains). This is an issue for 'xl devd', as it won't
start anymore.


These look non-fatal at first glance?


Indeed. I was too quick reading the trace and assumed `xl devd` exited
due to the errors, but those are non fatal, the process just
daemonized.

Thanks, Roger.


Cheers,
Andrea

 

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