[OmniOS-discuss] NFS v3 locking broken in latest OmniOS r151012 and updates

[Youzhong Yang]

max threads of nlockmgr is set to 20 I think. Bump up this value then you
can get rid of 'no locks available' error.

To confirm the current value:

echo ::svc_pool nlm | mdb -k | grep 'Max threads'

On Wed, Jan 28, 2015 at 11:49 AM, Joe Little <jmlittle at gmail.com> wrote:

> I recently switched one file server from Nexenta 4 Community (still uses
> closed NLM I believe) to OmniOS r151012.
>
> Immediately, users started to complain from various Linux clients that
> locking was failing. Most of those clients explicitly set their NFS version
> to 3. I finally isolated that the locking does not fail on NFS v4 and have
> worked on transition where possible. But presently, no NFS v3 client and
> successfully lock against OmniOS NFS v3 locking service. I've confirmed
> that the locking service is running and is present using rpcinfo, matching
> one for one in services from previous OpenSolaris and Illumos variants. One
> example from a user:
>
> $ strace /bin/tcsh
>
> [...]
>
> open("/home/REDACTED/.history", O_RDWR|O_CREAT, 0600) = 0
>
> dup(0)                                  = 1
>
> dup(1)                                  = 2
>
> dup(2)                                  = 3
>
> dup(3)                                  = 4
>
> dup(4)                                  = 5
>
> dup(5)                                  = 6
>
> close(5)                                = 0
>
> close(4)                                = 0
>
> close(3)                                = 0
>
> close(2)                                = 0
>
> close(1)                                = 0
>
> close(0)                                = 0
>
> fcntl(6, F_SETFD, FD_CLOEXEC)           = 0
>
> fcntl(6, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0})
>
>
> HERE fcntl hangs for 1-2 min and finally returns with "-1 ENOLCK (No
>
> locks available)"
>
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