diff options
| author | Jeff Layton <jlayton@primarydata.com> | 2014-11-21 22:19:28 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2014-12-09 19:22:22 +0300 |
| commit | 812443865c5fc255363d4a684a62c086af1addca (patch) | |
| tree | aed67f73c91814fc0ee5e59d53b8c97a28148074 /net/sunrpc/svc.c | |
| parent | 0b5707e4524eb817b7b02863887820d27b56910a (diff) | |
| download | linux-812443865c5fc255363d4a684a62c086af1addca.tar.xz | |
sunrpc: add a rcu_head to svc_rqst and use kfree_rcu to free it
...also make the manipulation of sp_all_threads list use RCU-friendly
functions.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Tested-by: Chris Worley <chris.worley@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/svc.c')
| -rw-r--r-- | net/sunrpc/svc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index a06a891012e5..b90d1bca4349 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -616,7 +616,7 @@ svc_prepare_thread(struct svc_serv *serv, struct svc_pool *pool, int node) serv->sv_nrthreads++; spin_lock_bh(&pool->sp_lock); pool->sp_nrthreads++; - list_add(&rqstp->rq_all, &pool->sp_all_threads); + list_add_rcu(&rqstp->rq_all, &pool->sp_all_threads); spin_unlock_bh(&pool->sp_lock); rqstp->rq_server = serv; rqstp->rq_pool = pool; @@ -684,7 +684,8 @@ found_pool: * so we don't try to kill it again. */ rqstp = list_entry(pool->sp_all_threads.next, struct svc_rqst, rq_all); - list_del_init(&rqstp->rq_all); + set_bit(RQ_VICTIM, &rqstp->rq_flags); + list_del_rcu(&rqstp->rq_all); task = rqstp->rq_task; } spin_unlock_bh(&pool->sp_lock); @@ -782,10 +783,11 @@ svc_exit_thread(struct svc_rqst *rqstp) spin_lock_bh(&pool->sp_lock); pool->sp_nrthreads--; - list_del(&rqstp->rq_all); + if (!test_and_set_bit(RQ_VICTIM, &rqstp->rq_flags)) + list_del_rcu(&rqstp->rq_all); spin_unlock_bh(&pool->sp_lock); - kfree(rqstp); + kfree_rcu(rqstp, rq_rcu_head); /* Release the server */ if (serv) |