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Message #143546
[Bug 585657] Re: Transfering large files to nfs mount causes system freeze
Since ages, still the same problem.
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=17.2
DISTRIB_CODENAME=rafaela
DISTRIB_DESCRIPTION="Linux Mint 17.2 Rafaela"
Linux 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC
2015 x86_64 x86_64 x86_64 GNU/Linux
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https://bugs.launchpad.net/bugs/585657
Title:
Transfering large files to nfs mount causes system freeze
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Lucid:
Fix Released
Status in linux source package in Maverick:
Fix Released
Status in linux source package in Natty:
Fix Released
Status in linux source package in Hardy:
Fix Released
Bug description:
Binary package hint: nfs-kernel-server
I have verified this bug on both karmic and lucid on both the server
and client:
-------------------------------------------------------------------------------
Description: Ubuntu 9.10
Release: 9.10
nfs-common:
Installed: 1:1.2.0-2ubuntu8
nfs-kernel-server:
Installed: 1:1.2.0-2ubuntu8
portmap:
Installed: 6.0-10ubuntu2
-------------------------------------------------------------------------------
Description: Ubuntu 10.04 LTS
Release: 10.04
nfs-common:
Installed: 1:1.2.0-4ubuntu4
nfs-kernel-server:
Installed: 1:1.2.0-4ubuntu4
portmap:
Installed: 6.0.0-1ubuntu2
-------------------------------------------------------------------------------
Expected behavior:
Copying large files from local directories to an nfs mounted directory
should complete without error.
-------------------------------------------------------------------------------
Actual behavior:
The system freezes while trying to copy large files from a local
directory (e.g. /tmp) to an nfs mounted directory. This causes various
things to fail to respond, ultimately resulting in a hard reboot and
potential loss of data. When this occurs I am able to log into the box
via ssh, but even sudo is unable to kill -9 the wayward file copy or
reboot the machine gracefully.
-------------------------------------------------------------------------------
Details:
The server exports several directories, for example:
/home/shared
/home/user1/Documents
/home/user1/Development
The client mounts these as follows:
server1:/home/shared /home/shared nfs rw,soft,intr 0 0
server1:/home/user1/Development /home/server1/user1/Development nfs rw,soft,intr 0 0
server1:/home/user1/Documents /home/server1/user1/Documents nfs rw,soft,intr 0 0
I see lots of messages like this in /var/log/syslog:
May 22 10:44:31 client1 kernel: [ 1680.390484] INFO: task cp:2791 blocked for more than 120 seconds.
May 22 10:44:31 client1 kernel: [ 1680.390488] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 22 10:44:31 client1 kernel: [ 1680.390492] cp D 00000000ffffffff 0 2791 2503 0x00000000
May 22 10:44:31 client1 kernel: [ 1680.390501] ffff88012a457c48 0000000000000082 0000000000015bc0 0000000000015bc0
May 22 10:44:31 client1 kernel: [ 1680.390508] ffff8801291331a0 ffff88012a457fd8 0000000000015bc0 ffff880129132de0
May 22 10:44:31 client1 kernel: [ 1680.390516] 0000000000015bc0 ffff88012a457fd8 0000000000015bc0 ffff8801291331a0
May 22 10:44:31 client1 kernel: [ 1680.390523] Call Trace:
May 22 10:44:31 client1 kernel: [ 1680.390545] [<ffffffffa0cff2b0>] ? nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390552] [<ffffffff8153eb87>] io_schedule+0x47/0x70
May 22 10:44:31 client1 kernel: [ 1680.390573] [<ffffffffa0cff2be>] nfs_wait_bit_uninterruptible+0xe/0x20 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390579] [<ffffffff8153f3df>] __wait_on_bit+0x5f/0x90
May 22 10:44:31 client1 kernel: [ 1680.390587] [<ffffffff812b6234>] ? __lookup_tag+0x64/0x120
May 22 10:44:31 client1 kernel: [ 1680.390608] [<ffffffffa0cff2b0>] ? nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390615] [<ffffffff8153f488>] out_of_line_wait_on_bit+0x78/0x90
May 22 10:44:31 client1 kernel: [ 1680.390622] [<ffffffff81085360>] ? wake_bit_function+0x0/0x40
May 22 10:44:31 client1 kernel: [ 1680.390643] [<ffffffffa0cff29f>] nfs_wait_on_request+0x2f/0x40 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390665] [<ffffffffa0d036af>] nfs_wait_on_requests_locked+0x7f/0xd0 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390688] [<ffffffffa0d04aee>] nfs_sync_mapping_wait+0x9e/0x1a0 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390711] [<ffffffffa0d04ed9>] nfs_write_mapping+0x79/0xb0 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390733] [<ffffffffa0d04f47>] nfs_wb_all+0x17/0x20 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390751] [<ffffffffa0cf3eba>] nfs_do_fsync+0x2a/0x60 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390770] [<ffffffffa0cf4105>] nfs_file_flush+0x75/0xa0 [nfs]
May 22 10:44:31 client1 kernel: [ 1680.390777] [<ffffffff8114051c>] filp_close+0x3c/0x90
May 22 10:44:31 client1 kernel: [ 1680.390783] [<ffffffff81140627>] sys_close+0xb7/0x120
May 22 10:44:31 client1 kernel: [ 1680.390790] [<ffffffff810131b2>] system_call_fastpath+0x16/0x1b
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