Re: Process stuck in D+ state

Allan Jude wrote:
> On 2013-10-13 15:10, Olivier Cochard-Labbé wrote:
> > I've got a frequent problem on my desktop (FreeBSD 10.0-ALPHA5 #8
> > r256200):
> > After few hours I can't acces to one of my folder: A simple "ls" in
> > this folder stucks, and all filesystem information started after
> > (df,
> > fstat) stuck too in D+.
> >
> > SIGINFO report this usage for these processes:
> >
> > load: 0.15  cmd: ls 15716 [rpcrecon] 217.89r 0.00u 0.00s 0% 2440k
> > load: 0.34  cmd: ls 15716 [connec] 2376.60r 0.00u 0.00s 0% 0k
> > load: 0.40  cmd: ls 15716 [connec] 2379.80r 0.00u 0.00s 0% 0k
> > load: 0.40  cmd: ls 15716 [connec] 2379.92r 0.00u 0.00s 0% 0k
> > load: 0.37  cmd: ls 15716 [rpcrecon] 2850.26r 0.00u 0.00s 0% 0k
> > load: 0.37  cmd: ls 15716 [rpcrecon] 2850.39r 0.00u 0.00s 0% 0k
> >
> > load: 0.40  cmd: fstat 15781 [rpcrecon] 2842.08r 0.00u 0.01s 0% 0k
> > load: 0.21  cmd: fstat 15781 [rpcrecon] 2879.35r 0.00u 0.01s 0% 0k
> > load: 0.21  cmd: fstat 15781 [rpcrecon] 2879.48r 0.00u 0.01s 0% 0k
> > load: 0.21  cmd: fstat 15781 [rpcrecon] 2879.63r 0.00u 0.01s 0% 0k
> >
> > load: 0.24  cmd: df 15919 [connec] 1047.98r 0.00u 0.00s 0% 0k
> > load: 0.22  cmd: df 15919 [connec] 1054.22r 0.00u 0.00s 0% 0k
> >
> > and the PS status:
> >
> > olivier    15919   0.0  0.0   14400     16  7  D+    7:06PM
> >     0:00.01 df -h
> > olivier    15781   0.0  0.0   20708     16  6  D+    6:26PM
> >     0:00.02 fstat
> > olivier    15651   0.0  0.0   16784     16  4  D+    6:25PM
> >     0:00.00 ls
> >
> > My desktop use a geli system and JSU, nothing special, here are the
> > mount point:
> > /dev/ada1p3.eli on / (ufs, local, noatime, journaled soft-updates)
> > devfs on /dev (devfs, local, multilabel)
> > /dev/gpt/boot on /boot2 (ufs, local, noatime, soft-updates)
> >
> > What kind of commands can I use for getting more troubleshooting(
> > information next time ?
> >
> > Thanks
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> Looking at the process states, connect and rpcreconnect, seem to
> suggest
> something involving yp/nis or NFS or some such.
> 
Yea. I don't think yp/nis uses the kernel rpc. All I can think
of is that you either have an NFS entry in your /etc/fstab or
an amd mapped mount point. rpc.lockd also uses the kernel rpc,
but I can't think of how it would become actiev without an NFS
mount.
(rpcrecon and connec suggest the kernel RPC is trying to (re)connect
 via TCP to an NFS server)

Good luck with it, rick

> try: ls -n (skip uid to symbolic name lookup) and see if it behaves
> any
> differently
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