diff options
| author |   Chuck Lever <chuck.lever@oracle.com> | 2022-04-29 10:06:21 -0400 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2022-05-23 11:06:29 -0400 |
| commit | 28df0988815f63e2af5e6718193c9f68681ad7ff (patch) | |
| tree | 63b9934813d5d24e8c90c65b396935abb8a722b2 /net/sunrpc/svc_xprt.c | |
| parent | NFSD: Clean up the show_nf_flags() macro (diff) | |
| download | linux-dev-28df0988815f63e2af5e6718193c9f68681ad7ff.tar.xz linux-dev-28df0988815f63e2af5e6718193c9f68681ad7ff.zip | |
SUNRPC: Use RMW bitops in single-threaded hot paths
I noticed CPU pipeline stalls while using perf.
Once an svc thread is scheduled and executing an RPC, no other
processes will touch svc_rqst::rq_flags. Thus bus-locked atomics are
not needed outside the svc thread scheduler.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc/svc_xprt.c')
| -rw-r--r-- | net/sunrpc/svc_xprt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 5df90bca10ed..2c4dd7ca95b0 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -1238,7 +1238,7 @@ static struct cache_deferred_req *svc_defer(struct cache_req *req) trace_svc_defer(rqstp); svc_xprt_get(rqstp->rq_xprt); dr->xprt = rqstp->rq_xprt; - set_bit(RQ_DROPME, &rqstp->rq_flags); + __set_bit(RQ_DROPME, &rqstp->rq_flags); dr->handle.revisit = svc_revisit; return &dr->handle; |