[OpenAFS] openafs client crashs after ubuntu kernel update

[Andreas Ladanyi]

This is a cryptographically signed message in MIME format.

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Hi Ben,
> 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 (whi=
ch
>> 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; y=
ou
> could try the PPA at https://launchpad.net/~openafs/+archive/ubuntu/sta=
ble
> to get packages including that change.

Thank you for advice with the change of sendfile function in the latest
ubuntu kernels.

We use the launchpad packets now.

Short feedback:
The workaround with afs_GenericStoreProc works for the first tests.
Colleges told me that the workaround with afs_GenericStoreProc seems to
result in slower read/write operations.
>
> -Ben
Andreas


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