On Sat, Jul 30, 2011 at 09:30:25AM +1000, NeilBrown wrote:

On Sat, 30 Jul 2011 06:34:44 +1000 Greg Banks [off-list ref] wrote:

quoted

Sent from my iPhone

On 30/07/2011, at 2:53, "J. Bruce Fields" [off-list ref] wrote:

quoted

On Fri, Jul 29, 2011 at 12:48:36PM -0400, bfields wrote:

quoted

On Fri, Jul 29, 2011 at 11:30:05PM +1000, Greg Banks wrote:

quoted

Sent from my iPhone

On 29/07/2011, at 22:11, Eric Dumazet [off-list ref]  
wrote:

quoted

Le vendredi 29 juillet 2011 à 21:58 +1000, Greg Banks a écrit :

quoted

Sure, and a whole lot of the callsites are ("..._%d", cpu),  
hence the
unfortune :(

BTW, we could name nfsd threads differently :

Currently, they all are named : "nfsd"

If SVC_POOL_PERCPU is selected, we could name them :
nfsd_c0 -> nfsd_cN

If SVC_POOL_PERNODE is selected, we could name them :
nfsd_n0  -> nfsd_nN

That would help to check with "ps aux" which cpu/nodes are under
stress.

I like it!

Yup, patch welcomed.--b.

(Annoying fact: some initscripts stop nfsd using a rough equivalent of
"killall nfsd".  So the name of the threads is arguably ABI.  I think
those initscripts are nuts and deserve what they get, but that may be
because I'm forgetting the reason they do that.)

We had this discussion in May-June 2008; it's because the nfsds were  
once  many many years ago userspace threads.

Even when they became kernel threads, 'kill' was the only way to kill them -
at first.

quoted

The "killall nfsd" semantics in those scripts are awful and lead to  
problems shutting down when there are lots of threads. It would  
probably be an improvement to provide a better shutdown mechanism and  
force distros to use it.

rpc.nfsd 0

will stop all nfsd threads.  Follow with

  exportfs -f

and you should be done.  I'm not 100% sure about the nfsv4 thread though -
would need to check.

Should be fine.

--b.
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