Package: src:linux Version: 3.16.39-1+deb8u1 Severity: important Dear Maintainer,
after installing the latest linux-image update, one of my Xen guests suddenly logged multiple kernel stacktraces. The initial one was this: Mar 4 03:05:14 saltmaster kernel: [798533.537459] WARNING: CPU: 1 PID: 9901 at /build/linux-NAZ6Cx/linux-3.16.39/arch/x86/xen/multicalls.c:129 __xen_mc_entry+0x110/0x180() Mar 4 03:05:14 saltmaster kernel: [798533.537463] Modules linked in: x86_pkg_temp_thermal thermal_sys intel_rapl coretemp crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper evdev cryptd pcspkr autofs4 ext4 crc16 mbcache jbd2 xen_netfront crct10di f_pclmul crct10dif_common xen_blkfront crc32c_intel Mar 4 03:05:14 saltmaster kernel: [798533.537483] CPU: 1 PID: 9901 Comm: salt-master Not tainted 3.16.0-4-amd64 #1 Debian 3.16.39-1+deb8u1 Mar 4 03:05:14 saltmaster kernel: [798533.537486] 0000000000000000 ffffffff81514c41 0000000000000000 0000000000000009 Mar 4 03:05:14 saltmaster kernel: [798533.537490] ffffffff81068867 00000000000001ff ffff88007adcbd00 0000000000000000 Mar 4 03:05:14 saltmaster kernel: [798533.537496] 0000000000000001 0000000000000150 ffffffff81005150 00000000000001ff Mar 4 03:05:14 saltmaster kernel: [798533.537501] Call Trace: Mar 4 03:05:14 saltmaster kernel: [798533.537507] [<ffffffff81514c41>] ? dump_stack+0x5d/0x78 Mar 4 03:05:14 saltmaster kernel: [798533.537513] [<ffffffff81068867>] ? warn_slowpath_common+0x77/0x90 Mar 4 03:05:14 saltmaster kernel: [798533.537517] [<ffffffff81005150>] ? __xen_mc_entry+0x110/0x180 Mar 4 03:05:14 saltmaster kernel: [798533.537521] [<ffffffff81006828>] ? xen_pin_page+0x58/0x160 Mar 4 03:05:14 saltmaster kernel: [798533.537524] [<ffffffff810067d0>] ? xen_do_pin+0x50/0x50 Mar 4 03:05:14 saltmaster kernel: [798533.537527] [<ffffffff81005ea4>] ? __xen_pgd_walk+0x2e4/0x310 Mar 4 03:05:14 saltmaster kernel: [798533.537529] [<ffffffff810067d0>] ? xen_do_pin+0x50/0x50 Mar 4 03:05:14 saltmaster kernel: [798533.537532] [<ffffffff81009a2b>] ? __xen_pgd_pin+0x5b/0x340 Mar 4 03:05:14 saltmaster kernel: [798533.537535] [<ffffffff81009d2e>] ? xen_dup_mmap+0x1e/0x30 Mar 4 03:05:14 saltmaster kernel: [798533.537539] [<ffffffff81067341>] ? copy_process.part.25+0x1781/0x1c50 Mar 4 03:05:14 saltmaster kernel: [798533.537543] [<ffffffff810679e0>] ? do_fork+0xe0/0x3d0 Mar 4 03:05:14 saltmaster kernel: [798533.537547] [<ffffffff811c6e8c>] ? __alloc_fd+0x7c/0x120 Mar 4 03:05:14 saltmaster kernel: [798533.537550] [<ffffffff8151b179>] ? stub_clone+0x69/0x90 Mar 4 03:05:14 saltmaster kernel: [798533.537554] [<ffffffff8151ae0d>] ? system_call_fast_compare_end+0x10/0x15 Mar 4 03:05:14 saltmaster kernel: [798533.537556] ---[ end trace ef0d5e3cd38fc131 ]--- immediately followed by this: Mar 4 03:05:14 saltmaster kernel: [798533.538577] WARNING: CPU: 1 PID: 9901 at /build/linux-NAZ6Cx/linux-3.16.39/arch/x86/xen/multicalls.c:129 __xen_pgd_pin+0x103/0x340() Mar 4 03:05:14 saltmaster kernel: [798533.538580] Modules linked in: x86_pkg_temp_thermal thermal_sys intel_rapl coretemp crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper evdev cryptd pcspkr autofs4 ext4 crc16 mbcache jbd2 xen_netfront crct10di f_pclmul crct10dif_common xen_blkfront crc32c_intel Mar 4 03:05:14 saltmaster kernel: [798533.538597] CPU: 1 PID: 9901 Comm: salt-master Tainted: G W 3.16.0-4-amd64 #1 Debian 3.16.39-1+deb8u1 Mar 4 03:05:14 saltmaster kernel: [798533.538600] 0000000000000000 ffffffff81514c41 0000000000000000 0000000000000009 Mar 4 03:05:14 saltmaster kernel: [798533.538604] ffffffff81068867 00000000000edf90 ffff8800fa160000 ffff88007bfb1800 Mar 4 03:05:14 saltmaster kernel: [798533.538608] ffff8800843fe000 000077ff80000000 ffffffff81009ad3 ffff88007bfb1800 Mar 4 03:05:14 saltmaster kernel: [798533.538611] Call Trace: Mar 4 03:05:14 saltmaster kernel: [798533.538614] [<ffffffff81514c41>] ? dump_stack+0x5d/0x78 Mar 4 03:05:14 saltmaster kernel: [798533.538617] [<ffffffff81068867>] ? warn_slowpath_common+0x77/0x90 Mar 4 03:05:14 saltmaster kernel: [798533.538621] [<ffffffff81009ad3>] ? __xen_pgd_pin+0x103/0x340 Mar 4 03:05:14 saltmaster kernel: [798533.538624] [<ffffffff81009d2e>] ? xen_dup_mmap+0x1e/0x30 Mar 4 03:05:14 saltmaster kernel: [798533.538627] [<ffffffff81067341>] ? copy_process.part.25+0x1781/0x1c50 Mar 4 03:05:14 saltmaster kernel: [798533.538630] [<ffffffff810679e0>] ? do_fork+0xe0/0x3d0 Mar 4 03:05:14 saltmaster kernel: [798533.538634] [<ffffffff811c6e8c>] ? __alloc_fd+0x7c/0x120 Mar 4 03:05:14 saltmaster kernel: [798533.538637] [<ffffffff8151b179>] ? stub_clone+0x69/0x90 Mar 4 03:05:14 saltmaster kernel: [798533.538641] [<ffffffff8151ae0d>] ? system_call_fast_compare_end+0x10/0x15 Mar 4 03:05:14 saltmaster kernel: [798533.538643] ---[ end trace ef0d5e3cd38fc132 ]--- After this, multiple stacktraces were logged without much call trace info: Mar 4 03:05:14 saltmaster kernel: [798533.538726] WARNING: CPU: 0 PID: 0 at /build/linux-NAZ6Cx/linux-3.16.39/arch/x86/xen/multicalls.c:129 xen_end_context_switch+0xe/0x20() Mar 4 03:05:14 saltmaster kernel: [798533.538732] Modules linked in: x86_pkg_temp_thermal thermal_sys intel_rapl coretemp crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper evdev cryptd pcspkr autofs4 ext4 crc16 mbcache jbd2 xen_netfront crct10di f_pclmul crct10dif_common xen_blkfront crc32c_intel Mar 4 03:05:14 saltmaster kernel: [798533.538759] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 3.16.0-4-amd64 #1 Debian 3.16.39-1+deb8u1 Mar 4 03:05:14 saltmaster kernel: [798533.538763] 0000000000000000 ffffffff81514c41 0000000000000000 0000000000000009 Mar 4 03:05:14 saltmaster kernel: [798533.538770] ffffffff81068867 ffff88007b5a5570 ffffffff8181a460 ffff88007f210380 Mar 4 03:05:14 saltmaster kernel: [798533.538776] 0000000000000000 0000000000000000 ffffffff8100331e ffff88007b5a5570 Mar 4 03:05:14 saltmaster kernel: [798533.538781] Call Trace: Mar 4 03:05:14 saltmaster kernel: [798533.538784] <UNK> Mar 4 03:05:14 saltmaster kernel: [798533.538786] ---[ end trace ef0d5e3cd38fc133 ]--- This continues for a few hours, until the system reboots spontaneously at 07:17:15. During reboot, the following is logged: Mar 4 07:17:15 saltmaster kernel: [ 0.000000] AGP: Checking aperture... Mar 4 07:17:15 saltmaster kernel: [ 0.000000] AGP: No AGP bridge found Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Calgary: detecting Calgary via BIOS EBDA area Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing! Mar 4 07:17:15 saltmaster kernel: [ 0.000000] BUG: Bad page state in process swapper pfn:202b8 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] page:ffffea0000709840 count:0 mapcount:-134217728 mapping: (null) index:0x0 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] page flags: 0x1ffff8000000000() Mar 4 07:17:15 saltmaster kernel: [ 0.000000] page dumped because: nonzero mapcount Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Modules linked in: Mar 4 07:17:15 saltmaster kernel: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.16.0-4-amd64 #1 Debian 3.16.39-1+deb8u1 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] ffffffff81017695 ffffffff81514c41 ffffea0000709840 ffffffff8172be88 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] ffffffff81512a84 ffffea0000709840 0000000000000000 00ffff8000000000 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] ffffffff81146ed8 ff00007ffe000000 ffffea0000700000 000000000000000a Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Call Trace: Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81017695>] ? show_stack+0x5/0x50 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81514c41>] ? dump_stack+0x5d/0x78 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81512a84>] ? bad_page.part.68+0xe8/0x102 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81146ed8>] ? free_pages_prepare+0x188/0x1a0 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81147215>] ? __free_pages_ok+0x15/0xd0 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff8192c7e5>] ? __free_memory_core+0x7c/0x8e Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff8192c9c4>] ? free_all_bootmem+0x59/0xdb Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff8191b2b5>] ? mem_init+0x62/0x92 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81902e1a>] ? start_kernel+0x23b/0x4a2 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81902a04>] ? set_init_arg+0x4e/0x4e Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81904f91>] ? xen_start_kernel+0x569/0x573 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Disabling lock debugging due to kernel taint Mar 4 07:17:15 saltmaster kernel: [ 0.000000] BUG: Bad page state in process swapper pfn:385ba Mar 4 07:17:15 saltmaster kernel: [ 0.000000] page:ffffea0000c540b0 count:0 mapcount:-67108864 mapping: (null) index:0x0 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] page flags: 0x1ffff8000000000() Mar 4 07:17:15 saltmaster kernel: [ 0.000000] page dumped because: nonzero mapcount Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Modules linked in: Mar 4 07:17:15 saltmaster kernel: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G B 3.16.0-4-amd64 #1 Debian 3.16.39-1+deb8u1 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] ffffffff81017695 ffffffff81514c41 ffffea0000c540b0 ffffffff8172be88 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] ffffffff81512a84 ffffea0000c540b0 0000000000000000 00ffff8000000000 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] ffffffff81146ed8 ff00007ffe000000 ffffea0000c4e000 000000000000000a Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Call Trace: Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81017695>] ? show_stack+0x5/0x50 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81514c41>] ? dump_stack+0x5d/0x78 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81512a84>] ? bad_page.part.68+0xe8/0x102 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81146ed8>] ? free_pages_prepare+0x188/0x1a0 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81147215>] ? __free_pages_ok+0x15/0xd0 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff8192c7e5>] ? __free_memory_core+0x7c/0x8e Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff8192c9c4>] ? free_all_bootmem+0x59/0xdb Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff8191b2b5>] ? mem_init+0x62/0x92 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81902e1a>] ? start_kernel+0x23b/0x4a2 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81902a04>] ? set_init_arg+0x4e/0x4e Mar 4 07:17:15 saltmaster kernel: [ 0.000000] [<ffffffff81904f91>] ? xen_start_kernel+0x569/0x573 Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Memory: 1995240K/2096764K available (5247K kernel code, 947K rwdata, 1832K rodata, 1208K init, 840K bss, 93332K reserved) Mar 4 07:17:15 saltmaster kernel: [ 0.000000] Hierarchical RCU implementation. Mar 4 07:17:15 saltmaster kernel: [ 0.000000] RCU dyntick-idle grace-period acceleration is enabled. Mar 4 07:17:15 saltmaster kernel: [ 0.000000] RCU restricting CPUs from NR_CPUS=512 to nr_cpu_ids=2. Mar 4 07:17:15 saltmaster kernel: [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 The system now appears slightly "upset" - an rsync to copy some files from it fails with "Corrupted MAC on input", so it is not working normally. The system has been running for a couple of years, and I have not seen this error before. There are several other Debian Linux Xen guests running on the same hypervisor, these have not shown any symptoms like this. -- Package-specific info: ** Version: Linux version 3.16.0-4-amd64 (debian-kernel@lists.debian.org) (gcc version 4.8.4 (Debian 4.8.4-1) ) #1 SMP Debian 3.16.39-1+deb8u1 (2017-02-22) ** Command line: root=/dev/xvda2 ro elevator=noop root=/dev/xvda2 ro ** Tainted: B (32) * System has hit bad_page. ** Kernel log: [ 1.252007] NET: Registered protocol family 17 [ 1.252013] mpls_gso: MPLS GSO support [ 1.252018] mce: Unable to init device /dev/mcelog (rc: -5) [ 1.252164] registered taskstats version 1 [ 1.252202] xenbus_probe_frontend: Device with no driver: device/vbd/51714 [ 1.252205] xenbus_probe_frontend: Device with no driver: device/vbd/51713 [ 1.252207] xenbus_probe_frontend: Device with no driver: device/vif/0 [ 1.252249] rtc_hctosys: unable to open rtc device (rtc0) [ 1.252276] PM: Hibernation image not present or could not be loaded. [ 1.252635] Freeing unused kernel memory: 1208K (ffffffff818ee000 - ffffffff81a1c000) [ 1.252640] Write protecting the kernel read-only data: 8192k [ 1.254350] Freeing unused kernel memory: 884K (ffff880001523000 - ffff880001600000) [ 1.254421] Freeing unused kernel memory: 216K (ffff8800017ca000 - ffff880001800000) [ 1.266464] systemd-udevd[65]: starting version 215 [ 1.267038] random: systemd-udevd: uninitialized urandom read (16 bytes read, 15 bits of entropy available) [ 1.279461] xen_netfront: Initialising Xen virtual ethernet driver [ 1.294881] blkfront: xvda2: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enabled; [ 1.305141] blkfront: xvda1: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enabled; [ 1.463793] PM: Starting manual resume from disk [ 1.463801] PM: Hibernation image partition 202:1 present [ 1.463802] PM: Looking for hibernation image. [ 1.463988] PM: Image not found (code -22) [ 1.463989] PM: Hibernation image not present or could not be loaded. [ 2.276961] EXT4-fs (xvda2): mounted filesystem with ordered data mode. Opts: (null) [ 2.654442] random: systemd: uninitialized urandom read (16 bytes read, 126 bits of entropy available) [ 2.655711] systemd[1]: systemd 215 running in system mode. (+PAM +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ -SECCOMP -APPARMOR) [ 2.655752] systemd[1]: Detected virtualization 'xen'. [ 2.655759] systemd[1]: Detected architecture 'x86-64'. [ 2.679081] random: nonblocking pool is initialized [ 2.746238] systemd[1]: Inserted module 'autofs4' [ 2.750795] systemd[1]: Set hostname to <saltmaster>. [ 3.016337] systemd[1]: Cannot add dependency job for unit dbus.socket, ignoring: Unit dbus.socket failed to load: No such file or directory. [ 3.016353] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory. [ 3.016581] systemd[1]: Starting Forward Password Requests to Wall Directory Watch. [ 3.016647] systemd[1]: Started Forward Password Requests to Wall Directory Watch. [ 3.016661] systemd[1]: Expecting device dev-hvc0.device... [ 3.016746] systemd[1]: Starting Remote File Systems (Pre). [ 3.016793] systemd[1]: Reached target Remote File Systems (Pre). [ 3.016810] systemd[1]: Starting Dispatch Password Requests to Console Directory Watch. [ 3.016849] systemd[1]: Started Dispatch Password Requests to Console Directory Watch. [ 3.016861] systemd[1]: Starting Paths. [ 3.016903] systemd[1]: Reached target Paths. [ 3.016924] systemd[1]: Starting Arbitrary Executable File Formats File System Automount Point. [ 3.017031] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point. [ 3.017046] systemd[1]: Starting Encrypted Volumes. [ 3.017089] systemd[1]: Reached target Encrypted Volumes. [ 3.017100] systemd[1]: Expecting device dev-xvda1.device... [ 3.017142] systemd[1]: Starting Root Slice. [ 3.017208] systemd[1]: Created slice Root Slice. [ 3.017223] systemd[1]: Starting User and Session Slice. [ 3.017293] systemd[1]: Created slice User and Session Slice. [ 3.017304] systemd[1]: Starting /dev/initctl Compatibility Named Pipe. [ 3.017378] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe. [ 3.017388] systemd[1]: Starting Delayed Shutdown Socket. [ 3.017445] systemd[1]: Listening on Delayed Shutdown Socket. [ 3.017455] systemd[1]: Starting Journal Socket (/dev/log). [ 3.017519] systemd[1]: Listening on Journal Socket (/dev/log). [ 3.017534] systemd[1]: Starting udev Kernel Socket. [ 3.017584] systemd[1]: Listening on udev Kernel Socket. [ 3.017598] systemd[1]: Starting udev Control Socket. [ 3.017652] systemd[1]: Listening on udev Control Socket. [ 3.017664] systemd[1]: Starting Journal Socket. [ 3.017732] systemd[1]: Listening on Journal Socket. [ 3.017746] systemd[1]: Starting System Slice. [ 3.017808] systemd[1]: Created slice System Slice. [ 3.017823] systemd[1]: Started File System Check on Root Device. [ 3.017832] systemd[1]: Starting system-getty.slice. [ 3.017897] systemd[1]: Created slice system-getty.slice. [ 3.017908] systemd[1]: Starting system-serial\x2dgetty.slice. [ 3.017972] systemd[1]: Created slice system-serial\x2dgetty.slice. [ 3.017994] systemd[1]: Starting Increase datagram queue length... [ 3.217265] systemd[1]: Starting Create list of required static device nodes for the current kernel... [ 3.217955] systemd[1]: Mounted Huge Pages File System. [ 3.234509] systemd[1]: Starting Load Kernel Modules... [ 3.235204] systemd[1]: Starting udev Coldplug all Devices... [ 3.235914] systemd[1]: Mounting Debug File System... [ 3.236562] systemd[1]: Mounting POSIX Message Queue File System... [ 3.268281] systemd[1]: Started Set Up Additional Binary Formats. [ 3.268325] systemd[1]: Starting Remount Root and Kernel File Systems... [ 3.269018] systemd[1]: Starting Slices. [ 3.269067] systemd[1]: Reached target Slices. [ 3.269602] systemd[1]: Started Increase datagram queue length. [ 3.269808] systemd[1]: Starting Syslog Socket. [ 3.269907] systemd[1]: Listening on Syslog Socket. [ 3.269937] systemd[1]: Starting Sockets. [ 3.269983] systemd[1]: Reached target Sockets. [ 3.269995] systemd[1]: Starting Journal Service... [ 3.270711] systemd[1]: Started Journal Service. [ 3.306061] EXT4-fs (xvda2): re-mounted. Opts: errors=remount-ro [ 3.664331] systemd-udevd[150]: starting version 215 [ 3.665885] systemd-journald[132]: Received request to flush runtime journal from PID 1 [ 3.905176] input: PC Speaker as /devices/platform/pcspkr/input/input0 [ 4.042357] Adding 1048572k swap on /dev/xvda1. Priority:-1 extents:1 across:1048572k SSFS [ 4.134682] AVX version of gcm_enc/dec engaged. [ 4.137005] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni) [ 4.171687] alg: No test for crc32 (crc32-pclmul) [ 4.324563] intel_rapl: Found RAPL domain package [ 4.324571] intel_rapl: Found RAPL domain core [ 4.324574] intel_rapl: Found RAPL domain uncore [ 4.324587] intel_rapl: RAPL package 0 domain package locked by BIOS ** Model information not available ** Loaded modules: x86_pkg_temp_thermal thermal_sys intel_rapl coretemp crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd evdev pcspkr autofs4 ext4 crc16 mbcache jbd2 xen_netfront xen_blkfront crct10dif_pclmul crct10dif_common crc32c_intel ** Network interface configuration: # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 192.168.20.50 gateway 192.168.20.1 netmask 255.255.255.0 broadcast 192.168.20.255 up sh -c "ethtool -K eth0 tx off; route add -net 10.11.0.0/24 gw 192.168.20.4 dev eth0" iface eth0 inet6 static address 2a01:4f8:190:7223:1::50 netmask 80 gateway fe80::5246:5dff:fe51:8590 ** Network status: *** IP interfaces and addresses: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:16:3e:77:86:1b brd ff:ff:ff:ff:ff:ff inet 192.168.20.50/24 brd 192.168.20.255 scope global eth0 valid_lft forever preferred_lft forever inet6 2a01:4f8:190:7223:1::50/80 scope global valid_lft forever preferred_lft forever inet6 fe80::216:3eff:fe77:861b/64 scope link valid_lft forever preferred_lft forever *** Device statistics: Inter-| Receive | Transmit face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed lo: 34597 418 0 0 0 0 0 0 34597 418 0 0 0 0 0 0 eth0: 18197416 164040 0 0 0 0 0 0 876446608 296905 0 0 0 0 0 0 *** Protocol statistics: Ip: 156302 total packets received 0 forwarded 0 incoming packets discarded 156302 incoming packets delivered 291179 requests sent out Icmp: 0 ICMP messages received 0 input ICMP message failed. ICMP input histogram: 0 ICMP messages sent 0 ICMP messages failed ICMP output histogram: Tcp: 17 active connections openings 60 passive connection openings 0 failed connection attempts 1 connection resets received 33 connections established 158712 segments received 638059 segments send out 559 segments retransmited 0 bad segments received. 60 resets sent Udp: 559 packets received 0 packets to unknown port received. 0 packet receive errors 559 packets sent UdpLite: TcpExt: 18 invalid SYN cookies received 6 TCP sockets finished time wait in fast timer 92 delayed acks sent 1 delayed acks further delayed because of locked socket Quick ack mode was activated 5 times 4 packets directly queued to recvmsg prequeue. 4 bytes directly received in process context from prequeue 7897 packet headers predicted 11149 acknowledgments not containing data payload received 135727 predicted acknowledgments 70 times recovered from packet loss by selective acknowledgements Detected reordering 1 times using FACK Detected reordering 4 times using SACK Detected reordering 17 times using time stamp 18 congestion windows partially recovered using Hoe heuristic 2 congestion windows recovered without slow start by DSACK TCPLostRetransmit: 7 474 fast retransmits 68 forward retransmits 16 retransmits in slow start TCPLossProbes: 1 TCPLossProbeRecovery: 1 5 DSACKs sent for old packets 63 DSACKs received TCPDSACKIgnoredOld: 1 TCPDSACKIgnoredNoUndo: 29 TCPSackShifted: 7 TCPSackMerged: 860 TCPSackShiftFallback: 10257 TCPRcvCoalesce: 245 TCPOFOQueue: 94 TCPChallengeACK: 3 TCPAutoCorking: 5210 TCPOrigDataSent: 634103 IpExt: InOctets: 10174075 OutOctets: 870175684 InNoECTPkts: 156455 ** PCI devices: not available ** USB devices: not available -- System Information: Debian Release: 8.7 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages linux-image-3.16.0-4-amd64 depends on: ii debconf [debconf-2.0] 1.5.56 ii initramfs-tools [linux-initramfs-tool] 0.120+deb8u2 ii kmod 18-3 ii linux-base 3.5 Versions of packages linux-image-3.16.0-4-amd64 recommends: pn firmware-linux-free <none> pn irqbalance <none> Versions of packages linux-image-3.16.0-4-amd64 suggests: pn debian-kernel-handbook <none> pn grub-pc | grub-efi | extlinux <none> pn linux-doc-3.16 <none> Versions of packages linux-image-3.16.0-4-amd64 is related to: pn firmware-atheros <none> pn firmware-bnx2 <none> pn firmware-bnx2x <none> pn firmware-brcm80211 <none> pn firmware-intelwimax <none> pn firmware-ipw2x00 <none> pn firmware-ivtv <none> pn firmware-iwlwifi <none> pn firmware-libertas <none> pn firmware-linux <none> pn firmware-linux-nonfree <none> pn firmware-myricom <none> pn firmware-netxen <none> pn firmware-qlogic <none> pn firmware-ralink <none> pn firmware-realtek <none> pn xen-hypervisor <none> -- debconf information: linux-image-3.16.0-4-amd64/postinst/mips-initrd-3.16.0-4-amd64: linux-image-3.16.0-4-amd64/prerm/removing-running-kernel-3.16.0-4-amd64: true linux-image-3.16.0-4-amd64/postinst/depmod-error-initrd-3.16.0-4-amd64: false