[9fans] Out of pseudo mount points

[9fans] Out of pseudo mount points

[Adriano Verardo]

I have 2 identical hosts (same hw, same kernel, same cpurc, ....) ...  but

A# import -b B /srv /srv
A# mount /srv/kfs /n/k

beeing /srv/kfs imported from B, works as expected and

B# import -b A /srv /srv
B# mount /srv/kfs /n/k

beeing /srv/kfs imported from A, produces
"mount: /n/k: Out of pseudo mount points".
The same for all file servers imported from A.

Where is/could be  the (my, sure) error ?
Can someone kindly help me ?

adriano

Re: [9fans] Out of pseudo mount points

[erik quanstrom]

On Wed Sep 23 15:34:38 PDT 2015, adriano.verardo@mail.com wrote:
> I have 2 identical hosts (same hw, same kernel, same cpurc, ....) ...  but
>
> A# import -b B /srv /srv
> A# mount /srv/kfs /n/k
>
> beeing /srv/kfs imported from B, works as expected and
>
> B# import -b A /srv /srv
> B# mount /srv/kfs /n/k
>
> beeing /srv/kfs imported from A, produces
> "mount: /n/k: Out of pseudo mount points".
> The same for all file servers imported from A.
>
> Where is/could be  the (my, sure) error ?
> Can someone kindly help me ?

can this be addressed with a a reboot?  if so, then i'd
recommend making Npsmpt larger in exportfs, otherwise
there's a bug in exportfs that's leaking pseudo mount points.

- erik

Re: [9fans] Out of pseudo mount points

[Adriano Verardo]

erik quanstrom wrote:
> On Wed Sep 23 15:34:38 PDT 2015, adriano.verardo@mail.com wrote:
>> I have 2 identical hosts (same hw, same kernel, same cpurc, ....) ...  but
>>
>> A# import -b B /srv /srv
>> A# mount /srv/kfs /n/k
>>
>> beeing /srv/kfs imported from B, works as expected and
>>
>> B# import -b A /srv /srv
>> B# mount /srv/kfs /n/k
>>
>> beeing /srv/kfs imported from A, produces
>> "mount: /n/k: Out of pseudo mount points".
>> The same for all file servers imported from A.
>>
>> Where is/could be  the (my, sure) error ?
>> Can someone kindly help me ?
> can this be addressed with a a reboot?
No
> if so, then i'd
> recommend making Npsmpt larger in exportfs,
it's wired to 32!
>   otherwise
> there's a bug in exportfs that's leaking pseudo mount points.
The same exportfs runs on A and B.
B->A woks, A->B doesnt.
Probably there is something wrong on A, not in exportfs.
Not a "true" bug but a not-well-managed (because very-very strange)
external event/condition.

I'll investigate with some print() in the code, I don't know how to use
acid on an exportfs started by listen.

adriano

Re: [9fans] Out of pseudo mount points

[Charles Forsyth]

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On 24 September 2015 at 20:55, Adriano Verardo <adriano.verardo@mail.com>
wrote:

> B->A woks, A->B doesnt.
> Probably there is something wrong on A, not in exportfs.
>

You need /mnt/exportfs with a set of numbered directories in it, which
might be missing on A:

% ls /mnt/exportfs
/mnt/exportfs/0
/mnt/exportfs/1
/mnt/exportfs/10
/mnt/exportfs/11
/mnt/exportfs/12
/mnt/exportfs/13
/mnt/exportfs/14
/mnt/exportfs/15
/mnt/exportfs/16
/mnt/exportfs/2
/mnt/exportfs/3
/mnt/exportfs/4
/mnt/exportfs/5
/mnt/exportfs/6
/mnt/exportfs/7
/mnt/exportfs/8
/mnt/exportfs/9

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Re: [9fans] Out of pseudo mount points

[Adriano Verardo]

Back home today ... I see no subdirs under /mnt/exportfs.
Done. Now both A and B work fine.
Thank you very much Charles !
adriano
> On 24 September 2015 at 20:55, Adriano Verardo
> <adriano.verardo@mail.com <mailto:adriano.verardo@mail.com>> wrote:
>
>     B->A woks, A->B doesnt.
>     Probably there is something wrong on A, not in exportfs.
>
>
> You need /mnt/exportfs with a set of numbered directories in it, which
> might be missing on A:
>
> % ls /mnt/exportfs
> /mnt/exportfs/0
> /mnt/exportfs/1
> /mnt/exportfs/10
> /mnt/exportfs/11
> /mnt/exportfs/12
> /mnt/exportfs/13
> /mnt/exportfs/14
> /mnt/exportfs/15
> /mnt/exportfs/16
> /mnt/exportfs/2
> /mnt/exportfs/3
> /mnt/exportfs/4
> /mnt/exportfs/5
> /mnt/exportfs/6
> /mnt/exportfs/7
> /mnt/exportfs/8
> /mnt/exportfs/9
>