Re: nfsd becomes a zombie

Chuck Lever
2024-06-18T14:52:10Z

On Tue, Jun 18, 2024 at 04:29:55PM +0200, Harald Dunkel wrote:
> On 2024-06-17 21:20:54, Calum Mackay wrote:
> >
> > Harald: do you have a Debian/Ubuntu kernel version that doesn't see the
> > issue, please? i.e. ideally from the same 6.1.y series…
> >
>
> I had migrated the Server from Debian 11 to Debian 12 on Dec 11th 2023.
> The kernel version provided by Debian 11 at that time was 5.10.197. I
> can't remember having seen a frozen nfsd with this version.
>
> Since Dec 11th I had these kernels in use (all provided by Debian):
>
> 6.1.66 linux-image-6.1.0-15-amd64
> 6.1.69 linux-image-6.1.0-17-amd64
> 6.1.76 linux-image-6.1.0-18-amd64
> 6.1.85 linux-image-6.1.0-20-amd64
> 6.1.90 linux-image-6.1.0-21-amd64
>
> These are all "upstream" version numbers. The second column lists
> Debian's package names.
>
> AFAIR nfsd got stuck only on the 6.1.90 kernel (installed and booted
> on May 18th, first time freeze on May 26th). But I've got a weak
> memory in cases like this. I haven't found older kernel log files.
>
> Please remember that I have seen a frozen nfsd only 3 times since
> May 26th. Its not easy to reproduce.

I can find no NFSD or SUNRPC changes between v6.1.85 and v6.1.90.
Between v6.1.76 and v6.1.85, there are 48 NFSD changes, 8 changes to
fs/nfs/, and 3 changes to net/sunrpc/.

Are there any NFS client changes during the second half of May that
correlate with the NFSD misbehavior?

--
Chuck Lever