kernel-packages team mailing list archive

[Launchpad Bug Tracker <1116393@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug:

The following is from Launchpad Questions:

My CIFS network mount under Ubuntu 11.10 (Oneiric Ocelot) will freeze
without much obvious reason. Idling for an extensive time is the only
thing I can think of. Found many similar reports, eg:

http://www.centos.org/modules/newbb/print.php?form=1&topic_id=35154&forum=55&order=ASC&start=0
http://serverfault.com/questions/307636/virtualbox-running-fedora-15-keeps-losing-its-cifs-mount-of-a-windows-share

My symptom is, I am able to mount the CIFS Network drive fine. I can
write to it and read from it, for quite a while. The problem is that
eventually the mount will become inaccessible from linux.

When that happens I can't run ls /mnt/z. Even sudo umount -l
/mnt/zdoesn't work. In fact, when I run those commands they lock up the
shell in which they were run.

dmesg gives the following error

[   72.250743] CIFS VFS: default security mechanism requested.  The default security mechanism will be upgraded from ntlm to ntlmv2 in kernel release 3.1
[  126.807829] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[  288.336825] hrtimer: interrupt took 4463392 ns
[ 2036.256098] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
[ 3622.991531] CIFS VFS: Server corpfs1 has not responded in 300 seconds. Reconnecting...
[ 4722.294174] CIFS VFS: Unexpected lookup error -512
[ 4782.585254] CIFS VFS: Unexpected lookup error -512
[ 4855.705273] CIFS VFS: Unexpected lookup error -512

The reason that I suspect that idling for an extensive time is the
culprit is that I can see that the system seems to have recovered from
some kind of sleep mode, and remounting my prime HD (sda1). But I'm not
sure.

Here are more info of my system:

$ uname -rm
3.0.0-17-generic x86_64

$ modinfo /lib/modules/3.0.0-17-generic/kernel/fs/cifs/cifs.ko
filename:       /lib/modules/3.0.0-17-generic/kernel/fs/cifs/cifs.ko
version:        1.74
. . .
vermagic:       3.0.0-17-generic SMP mod_unload modversions

The ubuntu is running under virtualbox on my Windows 7 machine. the
network is always working on the Windows side.

Just logging what I am experiencing, and understand that there may not be any solution.
------------------------------------------------------------------------------------------

My own experience is that when downloading files using Opera and trying
to navigate the file system in order to find the directory in which I
wish to save the file, freezes Opera. If I try to open or save a file
using a text editor, say gVim, then a similar problem is encountered.
The freeze doesn't happen every time. I can't seem to work out why I
experience a freeze only some of the time. Any freeze may last several
minutes.

I am only seeing this with Kubuntu 12.10 and 13.04. I did  not see this
with Ubuntu/Kubuntu 12.04.

Disconnecting my NAS drive allows me to open and save files to any
directory without any freezing at all.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 kubuntu quantal raring
-- 
Navigating folders which include network shares in the folder structure can cause an application to freeze
https://bugs.launchpad.net/bugs/1116393
You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.