From: NeilBrown <neilb@xxxxxxx>
We can tell if a pool is congested by checking if the idle list is
empty. We don't need a separate flag.
Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
include/linux/sunrpc/svc.h | 1 -
net/sunrpc/svc.c | 1 -
net/sunrpc/svc_xprt.c | 4 +---
3 files changed, 1 insertion(+), 5 deletions(-)
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index e9c34e99bc88..22b3018ebf62 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -50,7 +50,6 @@ struct svc_pool {
/* bits for sp_flags */
enum {
SP_TASK_PENDING, /* still work to do even if no xprt is queued */
- SP_CONGESTED, /* all threads are busy, none idle */
SP_NEED_VICTIM, /* One thread needs to agree to exit */
SP_VICTIM_REMAINS, /* One thread needs to actually exit */
};
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 9d080fe2dcdf..db4674211f36 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -719,7 +719,6 @@ void svc_pool_wake_idle_thread(struct svc_pool *pool)
}
rcu_read_unlock();
- set_bit(SP_CONGESTED, &pool->sp_flags);
}
EXPORT_SYMBOL_GPL(svc_pool_wake_idle_thread);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index ebfeeb504a79..fa0d854a5596 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -735,8 +735,6 @@ static void svc_rqst_wait_for_work(struct svc_rqst *rqstp)
if (rqst_should_sleep(rqstp)) {
set_current_state(TASK_IDLE);
- smp_mb__before_atomic();
- clear_bit(SP_CONGESTED, &pool->sp_flags);
spin_lock_bh(&pool->sp_lock);
list_add(&rqstp->rq_idle, &pool->sp_idle_threads);
spin_unlock_bh(&pool->sp_lock);
@@ -874,7 +872,7 @@ void svc_recv(struct svc_rqst *rqstp)
/* Normally we will wait up to 5 seconds for any required
* cache information to be provided.
*/
- if (!test_bit(SP_CONGESTED, &pool->sp_flags))
+ if (!list_empty(&pool->sp_idle_threads))
rqstp->rq_chandle.thread_wait = 5 * HZ;
else
rqstp->rq_chandle.thread_wait = 1 * HZ;
