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authorTejun Heo <tj@kernel.org>2010-10-15 19:49:27 +0400
committerJ. Bruce Fields <bfields@redhat.com>2010-10-21 18:11:45 +0400
commita25e758c5fa1137e1bbc440194e55f7c59177145 (patch)
tree4563a1d423ef9c9d54ca0c1222d34274613b31cf /net
parent8f3a6de313391b6910aa7db185eb9f3e930a51cf (diff)
downloadlinux-a25e758c5fa1137e1bbc440194e55f7c59177145.tar.xz
sunrpc/xprtrdma: clean up workqueue usage
* Create and use svc_rdma_wq instead of using the system workqueue and flush_scheduled_work(). This workqueue is necessary to serve as flushing domain for rdma->sc_work which is used to destroy itself and thus can't be flushed explicitly. * Replace cancel_delayed_work() + flush_scheduled_work() with cancel_delayed_work_sync(). * Implement synchronous connect in xprt_rdma_connect() using flush_delayed_work() on the rdma_connect work instead of using flush_scheduled_work(). This is to prepare for the deprecation and removal of flush_scheduled_work(). Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma.c11
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_transport.c6
-rw-r--r--net/sunrpc/xprtrdma/transport.c5
3 files changed, 17 insertions, 5 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c
index d718b8fa9525..09af4fab1a45 100644
--- a/net/sunrpc/xprtrdma/svc_rdma.c
+++ b/net/sunrpc/xprtrdma/svc_rdma.c
@@ -43,6 +43,7 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/sysctl.h>
+#include <linux/workqueue.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/svc_rdma.h>
@@ -74,6 +75,8 @@ atomic_t rdma_stat_sq_prod;
struct kmem_cache *svc_rdma_map_cachep;
struct kmem_cache *svc_rdma_ctxt_cachep;
+struct workqueue_struct *svc_rdma_wq;
+
/*
* This function implements reading and resetting an atomic_t stat
* variable through read/write to a proc file. Any write to the file
@@ -231,7 +234,7 @@ static ctl_table svcrdma_root_table[] = {
void svc_rdma_cleanup(void)
{
dprintk("SVCRDMA Module Removed, deregister RPC RDMA transport\n");
- flush_scheduled_work();
+ destroy_workqueue(svc_rdma_wq);
if (svcrdma_table_header) {
unregister_sysctl_table(svcrdma_table_header);
svcrdma_table_header = NULL;
@@ -249,6 +252,11 @@ int svc_rdma_init(void)
dprintk("\tsq_depth : %d\n",
svcrdma_max_requests * RPCRDMA_SQ_DEPTH_MULT);
dprintk("\tmax_inline : %d\n", svcrdma_max_req_size);
+
+ svc_rdma_wq = alloc_workqueue("svc_rdma", 0, 0);
+ if (!svc_rdma_wq)
+ return -ENOMEM;
+
if (!svcrdma_table_header)
svcrdma_table_header =
register_sysctl_table(svcrdma_root_table);
@@ -283,6 +291,7 @@ int svc_rdma_init(void)
kmem_cache_destroy(svc_rdma_map_cachep);
err0:
unregister_sysctl_table(svcrdma_table_header);
+ destroy_workqueue(svc_rdma_wq);
return -ENOMEM;
}
MODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>");
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 22f65cc46fe5..9df1eadc912a 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -45,6 +45,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/workqueue.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include <linux/sunrpc/svc_rdma.h>
@@ -90,6 +91,9 @@ struct svc_xprt_class svc_rdma_class = {
/* WR context cache. Created in svc_rdma.c */
extern struct kmem_cache *svc_rdma_ctxt_cachep;
+/* Workqueue created in svc_rdma.c */
+extern struct workqueue_struct *svc_rdma_wq;
+
struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt)
{
struct svc_rdma_op_ctxt *ctxt;
@@ -1187,7 +1191,7 @@ static void svc_rdma_free(struct svc_xprt *xprt)
struct svcxprt_rdma *rdma =
container_of(xprt, struct svcxprt_rdma, sc_xprt);
INIT_WORK(&rdma->sc_work, __svc_rdma_free);
- schedule_work(&rdma->sc_work);
+ queue_work(svc_rdma_wq, &rdma->sc_work);
}
static int svc_rdma_has_wspace(struct svc_xprt *xprt)
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 2da32b40bfcf..0867070bb5ca 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -237,8 +237,7 @@ xprt_rdma_destroy(struct rpc_xprt *xprt)
dprintk("RPC: %s: called\n", __func__);
- cancel_delayed_work(&r_xprt->rdma_connect);
- flush_scheduled_work();
+ cancel_delayed_work_sync(&r_xprt->rdma_connect);
xprt_clear_connected(xprt);
@@ -448,7 +447,7 @@ xprt_rdma_connect(struct rpc_task *task)
} else {
schedule_delayed_work(&r_xprt->rdma_connect, 0);
if (!RPC_IS_ASYNC(task))
- flush_scheduled_work();
+ flush_delayed_work(&r_xprt->rdma_connect);
}
}