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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 18:09:57 +00:00
SUNRPC: Remove now-redundant RCU-safe rpc_task free path
Now that we've tightened up the locking rules for RPC queue wakeups, we can remove the RCU-safe kfree calls... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
parent
ff2d7db848
commit
5e4424af9a
4 changed files with 15 additions and 48 deletions
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@ -58,19 +58,13 @@ struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
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return p;
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}
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static void nfs_readdata_rcu_free(struct rcu_head *head)
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static void nfs_readdata_free(struct nfs_read_data *p)
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{
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struct nfs_read_data *p = container_of(head, struct nfs_read_data, task.u.tk_rcu);
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if (p && (p->pagevec != &p->page_array[0]))
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kfree(p->pagevec);
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mempool_free(p, nfs_rdata_mempool);
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}
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static void nfs_readdata_free(struct nfs_read_data *rdata)
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{
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call_rcu_bh(&rdata->task.u.tk_rcu, nfs_readdata_rcu_free);
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}
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void nfs_readdata_release(void *data)
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{
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struct nfs_read_data *rdata = data;
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@ -58,19 +58,13 @@ struct nfs_write_data *nfs_commit_alloc(void)
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return p;
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}
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static void nfs_commit_rcu_free(struct rcu_head *head)
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void nfs_commit_free(struct nfs_write_data *p)
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{
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struct nfs_write_data *p = container_of(head, struct nfs_write_data, task.u.tk_rcu);
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if (p && (p->pagevec != &p->page_array[0]))
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kfree(p->pagevec);
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mempool_free(p, nfs_commit_mempool);
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}
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void nfs_commit_free(struct nfs_write_data *wdata)
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{
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call_rcu_bh(&wdata->task.u.tk_rcu, nfs_commit_rcu_free);
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}
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struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
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{
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struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, GFP_NOFS);
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@ -92,19 +86,13 @@ struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
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return p;
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}
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static void nfs_writedata_rcu_free(struct rcu_head *head)
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static void nfs_writedata_free(struct nfs_write_data *p)
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{
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struct nfs_write_data *p = container_of(head, struct nfs_write_data, task.u.tk_rcu);
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if (p && (p->pagevec != &p->page_array[0]))
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kfree(p->pagevec);
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mempool_free(p, nfs_wdata_mempool);
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}
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static void nfs_writedata_free(struct nfs_write_data *wdata)
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{
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call_rcu_bh(&wdata->task.u.tk_rcu, nfs_writedata_rcu_free);
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}
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void nfs_writedata_release(void *data)
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{
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struct nfs_write_data *wdata = data;
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@ -11,7 +11,6 @@
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#include <linux/timer.h>
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#include <linux/sunrpc/types.h>
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#include <linux/rcupdate.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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@ -77,7 +76,6 @@ struct rpc_task {
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union {
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struct work_struct tk_work; /* Async task work queue */
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struct rpc_wait tk_wait; /* RPC wait */
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struct rcu_head tk_rcu; /* for task deletion */
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} u;
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unsigned short tk_timeouts; /* maj timeouts */
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@ -393,11 +393,9 @@ static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct r
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*/
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void rpc_wake_up_queued_task(struct rpc_wait_queue *queue, struct rpc_task *task)
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{
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rcu_read_lock_bh();
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spin_lock(&queue->lock);
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spin_lock_bh(&queue->lock);
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rpc_wake_up_task_queue_locked(queue, task);
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spin_unlock(&queue->lock);
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rcu_read_unlock_bh();
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spin_unlock_bh(&queue->lock);
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}
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EXPORT_SYMBOL_GPL(rpc_wake_up_queued_task);
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@ -470,16 +468,14 @@ struct rpc_task * rpc_wake_up_next(struct rpc_wait_queue *queue)
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dprintk("RPC: wake_up_next(%p \"%s\")\n",
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queue, rpc_qname(queue));
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rcu_read_lock_bh();
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spin_lock(&queue->lock);
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spin_lock_bh(&queue->lock);
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if (RPC_IS_PRIORITY(queue))
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task = __rpc_wake_up_next_priority(queue);
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else {
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task_for_first(task, &queue->tasks[0])
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rpc_wake_up_task_queue_locked(queue, task);
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}
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spin_unlock(&queue->lock);
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rcu_read_unlock_bh();
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spin_unlock_bh(&queue->lock);
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return task;
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}
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@ -496,8 +492,7 @@ void rpc_wake_up(struct rpc_wait_queue *queue)
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struct rpc_task *task, *next;
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struct list_head *head;
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rcu_read_lock_bh();
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spin_lock(&queue->lock);
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spin_lock_bh(&queue->lock);
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head = &queue->tasks[queue->maxpriority];
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for (;;) {
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list_for_each_entry_safe(task, next, head, u.tk_wait.list)
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@ -506,8 +501,7 @@ void rpc_wake_up(struct rpc_wait_queue *queue)
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break;
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head--;
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}
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spin_unlock(&queue->lock);
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rcu_read_unlock_bh();
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spin_unlock_bh(&queue->lock);
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}
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EXPORT_SYMBOL_GPL(rpc_wake_up);
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@ -523,8 +517,7 @@ void rpc_wake_up_status(struct rpc_wait_queue *queue, int status)
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struct rpc_task *task, *next;
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struct list_head *head;
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rcu_read_lock_bh();
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spin_lock(&queue->lock);
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spin_lock_bh(&queue->lock);
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head = &queue->tasks[queue->maxpriority];
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for (;;) {
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list_for_each_entry_safe(task, next, head, u.tk_wait.list) {
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@ -535,8 +528,7 @@ void rpc_wake_up_status(struct rpc_wait_queue *queue, int status)
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break;
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head--;
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}
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spin_unlock(&queue->lock);
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rcu_read_unlock_bh();
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spin_unlock_bh(&queue->lock);
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}
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EXPORT_SYMBOL_GPL(rpc_wake_up_status);
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@ -848,13 +840,6 @@ rpc_alloc_task(void)
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return (struct rpc_task *)mempool_alloc(rpc_task_mempool, GFP_NOFS);
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}
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static void rpc_free_task_rcu(struct rcu_head *rcu)
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{
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struct rpc_task *task = container_of(rcu, struct rpc_task, u.tk_rcu);
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dprintk("RPC: %5u freeing task\n", task->tk_pid);
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mempool_free(task, rpc_task_mempool);
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}
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/*
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* Create a new task for the specified client.
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*/
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@ -883,8 +868,10 @@ static void rpc_free_task(struct rpc_task *task)
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const struct rpc_call_ops *tk_ops = task->tk_ops;
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void *calldata = task->tk_calldata;
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if (task->tk_flags & RPC_TASK_DYNAMIC)
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call_rcu_bh(&task->u.tk_rcu, rpc_free_task_rcu);
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if (task->tk_flags & RPC_TASK_DYNAMIC) {
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dprintk("RPC: %5u freeing task\n", task->tk_pid);
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mempool_free(task, rpc_task_mempool);
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}
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rpc_release_calldata(tk_ops, calldata);
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}
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