Forgot extract from kern.log: root@diaspora:/var/log# tail kern.log 2019-09-24 18:28:59 [111619.370870] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370876] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370882] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370887] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370892] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370898] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370903] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370912] nfs: server nfs4sas not responding, timed out 2019-09-24 18:28:59 [111619.370925] nfs: server nfs4sas not responding, timed out
root@diaspora:/var/log# uname -a Linux diaspora 5.0.0-29-generic #31~18.04.1-Ubuntu SMP Thu Sep 12 18:29:21 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1845186 Title: nfs Input/output error Status in linux package in Ubuntu: Incomplete Bug description: On Obuntu 18.04 with Linux kernel 5.0.0-29 (and 5.0.0-27) I am getting errors when writing files > 200 MB on a nfs filesystem, no matter which nfs server I use (Linux or Netapp). Example with a Netapp nfs server: root@tux:# uname -a Linux tux 5.0.0-29-generic #31~18.04.1-Ubuntu SMP Thu Sep 12 18:29:21 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux root@tux:# mount.nfs -o nfsvers=3,rw,rsize=1048576,wsize=1048576,tcp,timeo=10,soft nfs4sas.storage.tik.uni-stuttgart.de:/nfs4sas_scratch /nfs/rusnas/scr root@tux:/nfs/rusnas/scr# dd status=progress bs=1M count=1024 if=/dev/zero of=dd.tmp; l dd.tmp dd: closing output file 'dd.tmp': Input/output error l: dd.tmp - Input/output error root@tux:/nfs/rusnas/scr# l l: cannot read ./ : Stale file handle (reboot) root@tux:~# uname -a Linux tux 5.0.0-27-generic #28~18.04.1-Ubuntu SMP Thu Aug 22 03:00:32 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux root@tux:~# mount.nfs -o nfsvers=3,rw,rsize=1048576,wsize=1048576,tcp,timeo=10,soft nfs4sas.storage.tik.uni-stuttgart.de:/nfs4sas_scratch /nfs/rusnas/scr root@tux:/nfs/rusnas/scr# dd status=progress bs=1M count=1024 if=/dev/zero of=dd.tmp; l dd.tmp dd: closing output file 'dd.tmp': Input/output error -RW- 647,364,608 2019-09-24 11:54 dd.tmp The same error occurs when I use a Ubuntu 18.04 nfs server with kernel 5.0.0-29 I get no error with kernel 4.15.0-64: root@tux:# uname -a Linux tux 4.15.0-64-generic #73-Ubuntu SMP Thu Sep 12 13:16:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux root@tux:# mount.nfs -o nfsvers=3,rw,rsize=1048576,wsize=1048576,tcp,timeo=10,soft nfs4sas.storage.tik.uni-stuttgart.de:/nfs4sas_scratch /nfs/rusnas/scr root@tux:/nfs/rusnas/scr# dd status=progress bs=1M count=1024 if=/dev/zero of=dd.tmp; l dd.tmp 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 9.40337 s, 114 MB/s -RW- 1,073,741,824 2019-09-24 11:48 dd.tmp Also no error occurs when I use the sync nfs mount option: root@tux:/# mount.nfs -o nfsvers=3,rw,rsize=1048576,wsize=1048576,tcp,timeo=10,soft,sync nfs4sas.storage.tik.uni-stuttgart.de:/nfs4sas_scratch /nfs/rusnas/scr root@tux:/nfs/rusnas/scr# dd status=progress bs=1M count=1024 if=/dev/zero of=dd.tmp; l dd.tmp 996147200 bytes (996 MB, 950 MiB) copied, 13 s, 76.6 MB/s 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 13.7691 s, 78.0 MB/s -RW- 1,073,741,824 2019-09-24 11:58 dd.tmp As you can see: no more errors, but much slower! So, this is not a solution, just a workaround. On smaller files, there is error: root@diaspora:/nfs/rusnas/software# mount | grep $PWD nfs4sas:/nfs4sas_software on /nfs/rusnas/software type nfs (rw,relatime,vers=3,rsize=65536,wsize=65536,namlen=255,soft,proto=tcp,timeo=10,retrans=2,sec=sys,mountaddr=129.69.2.23,mountvers=3,mountport=635,mountproto=tcp,local_lock=none,addr=129.69.2.23) root@diaspora:/nfs/rusnas/software# dd bs=1M count=200 if=/dev/zero of=dd.tmp; l dd.tmp 200+0 records in 200+0 records out 209715200 bytes (210 MB, 200 MiB) copied, 2.25616 s, 93.0 MB/s -RW- 209,715,200 2019-09-24 12:33 dd.tmp root@diaspora:/nfs/rusnas/software# dd bs=1M count=300 if=/dev/zero of=dd.tmp; l dd.tmp dd: closing output file 'dd.tmp': Input/output error -RW- 293,535,744 2019-09-24 12:34 dd.tmp ==> the nfs client in Ubuntu 18.04 kernel 5.0.0 has a bug! root@tux:/nfs/rusnas/scr# dpkg -S /boot/vmlinuz-5.0.0-29-generic linux-image-5.0.0-29-generic: /boot/vmlinuz-5.0.0-29-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1845186/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
