[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] The command "cat /proc/bus/input/devices" is blocking

Thank you for your reply.

So you don't know why the kernel is blocking in this situation ?

I'm on a Debian Jessie system using only packages from Debian.

Le 11/01/2017 à 15:32, Charles Gonçalves a écrit :
I had this problem when I've installed xen from sources and tried to
install the xen-tools from debian repos.
The package manager has overwritten some xen configuration files and
this error started to happen.

After some time spent with no success in fixing it I've rebuild the system!

On Wed, Jan 11, 2017 at 8:47 AM <msd+xen-users@xxxxxx
<mailto:msd%2Bxen-users@xxxxxx>> wrote:


    I have a problem on some of my xen servers.

    Quickly : the command "cat /proc/bus/input/devices" is blocking. Nothing
    is never returned.

    Details :

    I try to install a new xen vm with xen-tools.
    When it configure the new vm, the script
    "/var/lib/dpkg/info/keyboard-configuration.postinst" tries to read
    "/proc/bus/input/devices" and blocks.
    So the vm is never created and the script freezes.
    After a reboot of the server, the command works again.
    Here is an extract of strace that show the kernel blocks on the read

     > # strace cat /proc/bus/input/devices
     > [...]
     > open("/proc/bus/input/devices", O_RDONLY) = 3
     > fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
     > fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
    -1, 0) = 0x7feca3567000
     > read(3,

     > # uname -a
     > Linux xen 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19)
    x86_64 GNU/Linux

    Do you know what can happens ?



    Xen-users mailing list
    Xen-users@xxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxx>

Charles F.'. Gonçalves

Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.