All clients are using the kernel client on proxmox kernel
version 5.0.21-3-pve.

The mds logs are not showing anything interesting and have very little in
them except for the restarts, maybe i need to increase debug level ?

On Tue, Oct 29, 2019 at 6:33 AM Lars Täuber <taeu...@bbaw.de> wrote:

> Hi!
>
> What kind of client (kernel vs. FUSE) do you use?
> I experience a lot of the following problems with the most recent ubuntu
> 18.04.3 kernel 4.15.0-66-generic :
> kernel: [260144.644232] cache_from_obj: Wrong slab cache. inode_cache but
> object is from ceph_inode_info
>
> Other clients with older kernels (e.g. 4.15.0-47-generic) work without
> interruption on the same CephFS.
>
>
> Lars
>
>
> Mon, 28 Oct 2019 22:10:25 +0000
> Kári Bertilsson <karibert...@gmail.com> ==> Patrick Donnelly <
> pdonn...@redhat.com> :
> > Any ideas or tips on how to debug further ?
> >
> > On Mon, Oct 28, 2019 at 7:17 PM Kári Bertilsson <karibert...@gmail.com>
> > wrote:
> >
> > > Hello Patrick,
> > >
> > > Here is output from those commands
> > > https://pastebin.com/yUmuQuYj
> > >
> > > 5 clients have the file system mounted, but only 2 of them have most of
> > > the activity.
> > >
> > >
> > >
> > > On Mon, Oct 28, 2019 at 6:54 PM Patrick Donnelly <pdonn...@redhat.com>
> > > wrote:
> > >
> > >> Hello Kári,
> > >>
> > >> On Mon, Oct 28, 2019 at 11:14 AM Kári Bertilsson <
> karibert...@gmail.com>
> > >> wrote:
> > >> > This seems to happen mostly when listing folders containing 10k+
> > >> folders.
> > >> >
> > >> > The dirlisting hangs indefinitely or until i restart the active MDS
> and
> > >> then the hanging "ls" command will finish running.
> > >> >
> > >> > Every time restarting the active MDS fixes the problem for a
> while.
> > >>
> > >> Please share details about your cluster. `fs dump`, `ceph status`, and
> > >> `ceph versions`. How many clients are using the file system?
> > >>
> > >> --
> > >> Patrick Donnelly, Ph.D.
> > >> He / Him / His
> > >> Senior Software Engineer
> > >> Red Hat Sunnyvale, CA
> > >> GPG: 19F28A586F808C2402351B93C3301A3E258DD79D
> > >>
> > >>
>
>
> --
>                             Informationstechnologie
> Berlin-Brandenburgische Akademie der Wissenschaften
> Jägerstraße 22-23                      10117 Berlin
> Tel.: +49 30 20370-352           http://www.bbaw.de
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