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authorChuck Lever <chuck.lever@oracle.com>2021-10-04 17:10:10 +0300
committerTrond Myklebust <trond.myklebust@hammerspace.com>2021-10-10 12:05:54 +0300
commit0392dd51f9c78d46109a408f27dc820300dcd8bd (patch)
treef3b4644162169edcdde27b972e2c9c36ec35fe2f /net/sunrpc/sched.c
parent8e09650f5ec68858f4b8b67cdef9e2ece9b208f3 (diff)
downloadlinux-0392dd51f9c78d46109a408f27dc820300dcd8bd.tar.xz
SUNRPC: Per-rpc_clnt task PIDs
The current range of RPC task PIDs is 0..65535. That's not adequate for distinguishing tasks across multiple rpc_clnts running high throughput workloads. To help relieve this situation and to reduce the bottleneck of having a single atomic for assigning all RPC task PIDs, assign task PIDs per rpc_clnt. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/sched.c')
-rw-r--r--net/sunrpc/sched.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index b21457cec8a5..f4f311ea7a66 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -277,9 +277,17 @@ static int rpc_wait_bit_killable(struct wait_bit_key *key, int mode)
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS)
static void rpc_task_set_debuginfo(struct rpc_task *task)
{
- static atomic_t rpc_pid;
+ struct rpc_clnt *clnt = task->tk_client;
- task->tk_pid = atomic_inc_return(&rpc_pid);
+ /* Might be a task carrying a reverse-direction operation */
+ if (!clnt) {
+ static atomic_t rpc_pid;
+
+ task->tk_pid = atomic_inc_return(&rpc_pid);
+ return;
+ }
+
+ task->tk_pid = atomic_inc_return(&clnt->cl_pid);
}
#else
static inline void rpc_task_set_debuginfo(struct rpc_task *task)