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Re: [Xen-users] The command "cat /proc/bus/input/devices" is blocking
Sorry, didn't had time to investigate further.
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:
>
> 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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> Xen-users@xxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxx>
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>
> --
> Charles F.'. Gonçalves
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