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Re: [Xen-users] The command "cat /proc/bus/input/devices" is blocking
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!
Hello,
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 call.
> # 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
> mmap(NULL, 139264, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-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 ?
Regards,
Msd
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