Commit add1511c authored by Chuck Lever's avatar Chuck Lever
Browse files

NFSD: Streamline the rare "found" case 



Move a rarely called function call site out of the hot path.

This is an exceptionally small improvement because the compiler
inlines most of the functions that nfsd_cache_lookup() calls.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 0f29ce32

fs/nfsd/nfscache.c

+3 −4
Original line number Diff line number Diff line
@@ -448,11 +448,8 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp) 
	b = nfsd_cache_bucket_find(rqstp->rq_xid, nn);

	spin_lock(&b->cache_lock);

	found = nfsd_cache_insert(b, rp, nn);

	if (found != rp) {

		nfsd_reply_cache_free_locked(NULL, rp, nn);

		rp = found;

	if (found != rp)

		goto found_entry;

	}



	nfsd_stats_rc_misses_inc();

	rqstp->rq_cacherep = rp;
@@ -470,8 +467,10 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp) 


found_entry:

	/* We found a matching entry which is either in progress or done. */

	nfsd_reply_cache_free_locked(NULL, rp, nn);

	nfsd_stats_rc_hits_inc();

	rtn = RC_DROPIT;

	rp = found;



	/* Request being processed */

	if (rp->c_state == RC_INPROG)