[OpenAFS] openafs client crashs after ubuntu kernel update

[Benjamin Kaduk]

On Tue, 5 Apr 2016, Andreas Ladanyi wrote:

> Hi,
>
> openafs client tells me unable to create file / connection timeout
> messages.
>
> It seems that this behavior appear when installing the latest kernel
> version of Ubuntu 15.10 and 14.04 LTS and maybe soon in 12.04 LTS (which
> i didnt upgrade yet).
>
> This problem is for example with ubuntu kernel release 4.2.0-35,
> 3.13.0-77, 3.13.0-83
> This problem is not for example with ubuntu kernel release 4.2.0-27,
> 3.13.0-24, 3.19.0-25

(e.g.) linux (4.2.0-28.33) introduces:

  * vfs: Make sendfile(2) killable even better
    - LP: #1536370

which is known to cause issues for openafs.
https://gerrit.openafs.org/#/c/12228/ is believed to be a workaround; you
could try the PPA at https://launchpad.net/~openafs/+archive/ubuntu/stable
to get packages including that change.

-Ben