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nfsd: optimise the starting of zero threads when none are running. 

Currently, if we ask to set then number of nfsd threads to zero when
there are none running, we set up all the sockets and register the
service, and then tear it all down again.
This is pointless.

So detect that case and exit promptly.
(also remove an assignment to 'error' which was never used.

Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Jeff Layton <jlayton@redhat.com>
This commit is contained in:
NeilBrown 2009-06-16 11:03:20 +10:00 committed by J. Bruce Fields
parent 82e12fe924
commit 671e1fcf63
1 changed files with 4 additions and 2 deletions
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6
fs/nfsd/nfssvc.c
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@ -390,12 +390,14 @@ nfsd_svc(unsigned short port, int nrservs)
mutex_lock(&nfsd_mutex);
dprintk("nfsd: creating service\n");
error = -EINVAL;
if (nrservs <= 0)
nrservs = 0;
if (nrservs > NFSD_MAXSERVS)
nrservs = NFSD_MAXSERVS;
error = 0;
if (nrservs == 0 && nfsd_serv == NULL)
goto out;
/* Readahead param cache - will no-op if it already exists */
error = nfsd_racache_init(2*nrservs);
if (error<0)