[OpenAFS-devel] linux45: smoke test failed

[Benjamin Kaduk]

On Thu, 16 Jun 2016, Stephan Wiesand wrote:

> I smoke tested what was planned to be OpenAFS 1.6.18.1, as discussed in yesterday's release team meeting, on a Fedora 23 x86_64 VM with kernel 4.5.6-200 today. The result was disappointing:
>
> git clone git://gerrit.openafs.org/openafs.git

Is the pwd the root of a volume?

> cd openafs
> git log
> # scrolled through a few dozen changes, took a couple of seconds
> git checkout openafs-stable-1_6_18
>
> At this point I got the following error:
>
> fatal: Unable to read current working directory: No such file or directory
>
> A "cd; cd -" cures this for a while, and there's no apparent data corruption. I'm still worried. The problem isn't 100% reproducible, but it doesn't take too may tries checking out random tags or branches.
>
> This was plain 1.6.18 + gerrit 12300 12301 12302 12274.
>
> Cache is on ext4, no separate partition, default size as set by our RPM (I think 100MB, but I don't have access to the VM right now to check).
>
> The small cache size may contribute to the problem. But I found no errors logged anywhere, and this shouldn't happen no matter how small the cache is.

Please check if the cmdebug output is empty (I expect it is, but it is
good to check).

> NB we have a user report of exactly this problem happening frequently while just editing files in a local git repo in AFS space. The data is a bit sketchy, but it's probably Ubuntu 14.04 with its current default kernel and the openafs packages from Anders' ppa. I'll try to get us more data.
>
>
> Any thoughts? For the time being I'm considering this a showstopper for
> 1.6.18.1, and it looks like we're not quite there yet regarding Linux
> 4.5, let alone 4.6 or the 4.7 due in a few weeks :-(

Can you run the same test on a 4.4 kernel for comparison?

Thanks,

Ben