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Diffstat (limited to 'fs/aio.c')
-rw-r--r--fs/aio.c75
1 files changed, 25 insertions, 50 deletions
diff --git a/fs/aio.c b/fs/aio.c
index d06a266769b..7afa222f680 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -40,9 +40,6 @@
#define dprintk(x...) do { ; } while (0)
#endif
-long aio_run = 0; /* for testing only */
-long aio_wakeups = 0; /* for testing only */
-
/*------ sysctl variables----*/
atomic_t aio_nr = ATOMIC_INIT(0); /* current system wide number of aio requests */
unsigned aio_max_nr = 0x10000; /* system wide maximum number of aio requests */
@@ -58,7 +55,7 @@ static void aio_fput_routine(void *);
static DECLARE_WORK(fput_work, aio_fput_routine, NULL);
static DEFINE_SPINLOCK(fput_lock);
-LIST_HEAD(fput_head);
+static LIST_HEAD(fput_head);
static void aio_kick_handler(void *);
@@ -290,7 +287,7 @@ static void aio_cancel_all(struct kioctx *ctx)
spin_unlock_irq(&ctx->ctx_lock);
}
-void wait_for_all_aios(struct kioctx *ctx)
+static void wait_for_all_aios(struct kioctx *ctx)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
@@ -405,7 +402,6 @@ static struct kiocb fastcall *__aio_get_req(struct kioctx *ctx)
req->ki_ctx = ctx;
req->ki_cancel = NULL;
req->ki_retry = NULL;
- req->ki_obj.user = NULL;
req->ki_dtor = NULL;
req->private = NULL;
INIT_LIST_HEAD(&req->ki_run_list);
@@ -451,11 +447,6 @@ static inline void really_put_req(struct kioctx *ctx, struct kiocb *req)
{
if (req->ki_dtor)
req->ki_dtor(req);
- req->ki_ctx = NULL;
- req->ki_filp = NULL;
- req->ki_obj.user = NULL;
- req->ki_dtor = NULL;
- req->private = NULL;
kmem_cache_free(kiocb_cachep, req);
ctx->reqs_active--;
@@ -592,7 +583,7 @@ static void use_mm(struct mm_struct *mm)
* Comments: Called with ctx->ctx_lock held. This nests
* task_lock instead ctx_lock.
*/
-void unuse_mm(struct mm_struct *mm)
+static void unuse_mm(struct mm_struct *mm)
{
struct task_struct *tsk = current;
@@ -623,7 +614,6 @@ static inline int __queue_kicked_iocb(struct kiocb *iocb)
if (list_empty(&iocb->ki_run_list)) {
list_add_tail(&iocb->ki_run_list,
&ctx->run_list);
- iocb->ki_queued++;
return 1;
}
return 0;
@@ -664,10 +654,8 @@ static ssize_t aio_run_iocb(struct kiocb *iocb)
}
if (!(iocb->ki_retried & 0xff)) {
- pr_debug("%ld retry: %d of %d (kick %ld, Q %ld run %ld, wake %ld)\n",
- iocb->ki_retried,
- iocb->ki_nbytes - iocb->ki_left, iocb->ki_nbytes,
- iocb->ki_kicked, iocb->ki_queued, aio_run, aio_wakeups);
+ pr_debug("%ld retry: %d of %d\n", iocb->ki_retried,
+ iocb->ki_nbytes - iocb->ki_left, iocb->ki_nbytes);
}
if (!(retry = iocb->ki_retry)) {
@@ -774,7 +762,6 @@ out:
static int __aio_run_iocbs(struct kioctx *ctx)
{
struct kiocb *iocb;
- int count = 0;
LIST_HEAD(run_list);
list_splice_init(&ctx->run_list, &run_list);
@@ -789,9 +776,7 @@ static int __aio_run_iocbs(struct kioctx *ctx)
aio_run_iocb(iocb);
if (__aio_put_req(ctx, iocb)) /* drop extra ref */
put_ioctx(ctx);
- count++;
}
- aio_run++;
if (!list_empty(&ctx->run_list))
return 1;
return 0;
@@ -879,7 +864,7 @@ static void aio_kick_handler(void *data)
* and if required activate the aio work queue to process
* it
*/
-void queue_kicked_iocb(struct kiocb *iocb)
+static void queue_kicked_iocb(struct kiocb *iocb)
{
struct kioctx *ctx = iocb->ki_ctx;
unsigned long flags;
@@ -890,10 +875,8 @@ void queue_kicked_iocb(struct kiocb *iocb)
spin_lock_irqsave(&ctx->ctx_lock, flags);
run = __queue_kicked_iocb(iocb);
spin_unlock_irqrestore(&ctx->ctx_lock, flags);
- if (run) {
+ if (run)
aio_queue_work(ctx);
- aio_wakeups++;
- }
}
/*
@@ -913,7 +896,6 @@ void fastcall kick_iocb(struct kiocb *iocb)
return;
}
- iocb->ki_kicked++;
/* If its already kicked we shouldn't queue it again */
if (!kiocbTryKick(iocb)) {
queue_kicked_iocb(iocb);
@@ -984,7 +966,8 @@ int fastcall aio_complete(struct kiocb *iocb, long res, long res2)
tail = info->tail;
event = aio_ring_event(info, tail, KM_IRQ0);
- tail = (tail + 1) % info->nr;
+ if (++tail >= info->nr)
+ tail = 0;
event->obj = (u64)(unsigned long)iocb->ki_obj.user;
event->data = iocb->ki_user_data;
@@ -1008,10 +991,8 @@ int fastcall aio_complete(struct kiocb *iocb, long res, long res2)
pr_debug("added to ring %p at [%lu]\n", iocb, tail);
- pr_debug("%ld retries: %d of %d (kicked %ld, Q %ld run %ld wake %ld)\n",
- iocb->ki_retried,
- iocb->ki_nbytes - iocb->ki_left, iocb->ki_nbytes,
- iocb->ki_kicked, iocb->ki_queued, aio_run, aio_wakeups);
+ pr_debug("%ld retries: %d of %d\n", iocb->ki_retried,
+ iocb->ki_nbytes - iocb->ki_left, iocb->ki_nbytes);
put_rq:
/* everything turned out well, dispose of the aiocb. */
ret = __aio_put_req(ctx, iocb);
@@ -1119,7 +1100,6 @@ static int read_events(struct kioctx *ctx,
int i = 0;
struct io_event ent;
struct aio_timeout to;
- int event_loop = 0; /* testing only */
int retry = 0;
/* needed to zero any padding within an entry (there shouldn't be
@@ -1186,7 +1166,6 @@ retry:
if (to.timed_out) /* Only check after read evt */
break;
schedule();
- event_loop++;
if (signal_pending(tsk)) {
ret = -EINTR;
break;
@@ -1214,9 +1193,6 @@ retry:
if (timeout)
clear_timeout(&to);
out:
- pr_debug("event loop executed %d times\n", event_loop);
- pr_debug("aio_run %ld\n", aio_run);
- pr_debug("aio_wakeups %ld\n", aio_wakeups);
return i ? i : ret;
}
@@ -1401,7 +1377,7 @@ static ssize_t aio_fsync(struct kiocb *iocb)
* Performs the initial checks and aio retry method
* setup for the kiocb at the time of io submission.
*/
-ssize_t aio_setup_iocb(struct kiocb *kiocb)
+static ssize_t aio_setup_iocb(struct kiocb *kiocb)
{
struct file *file = kiocb->ki_filp;
ssize_t ret = 0;
@@ -1470,7 +1446,8 @@ ssize_t aio_setup_iocb(struct kiocb *kiocb)
* because this callback isn't used for wait queues which
* are nested inside ioctx lock (i.e. ctx->wait)
*/
-int aio_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key)
+static int aio_wake_function(wait_queue_t *wait, unsigned mode,
+ int sync, void *key)
{
struct kiocb *iocb = container_of(wait, struct kiocb, ki_wait);
@@ -1514,8 +1491,7 @@ int fastcall io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
}
req->ki_filp = file;
- iocb->aio_key = req->ki_key;
- ret = put_user(iocb->aio_key, &user_iocb->aio_key);
+ ret = put_user(req->ki_key, &user_iocb->aio_key);
if (unlikely(ret)) {
dprintk("EFAULT: aio_key\n");
goto out_put_req;
@@ -1530,13 +1506,7 @@ int fastcall io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
req->ki_opcode = iocb->aio_lio_opcode;
init_waitqueue_func_entry(&req->ki_wait, aio_wake_function);
INIT_LIST_HEAD(&req->ki_wait.task_list);
- req->ki_run_list.next = req->ki_run_list.prev = NULL;
- req->ki_retry = NULL;
req->ki_retried = 0;
- req->ki_kicked = 0;
- req->ki_queued = 0;
- aio_run = 0;
- aio_wakeups = 0;
ret = aio_setup_iocb(req);
@@ -1544,10 +1514,14 @@ int fastcall io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
goto out_put_req;
spin_lock_irq(&ctx->ctx_lock);
- list_add_tail(&req->ki_run_list, &ctx->run_list);
- /* drain the run list */
- while (__aio_run_iocbs(ctx))
- ;
+ if (likely(list_empty(&ctx->run_list))) {
+ aio_run_iocb(req);
+ } else {
+ list_add_tail(&req->ki_run_list, &ctx->run_list);
+ /* drain the run list */
+ while (__aio_run_iocbs(ctx))
+ ;
+ }
spin_unlock_irq(&ctx->ctx_lock);
aio_put_req(req); /* drop extra ref to req */
return 0;
@@ -1620,7 +1594,8 @@ asmlinkage long sys_io_submit(aio_context_t ctx_id, long nr,
* Finds a given iocb for cancellation.
* MUST be called with ctx->ctx_lock held.
*/
-struct kiocb *lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb, u32 key)
+static struct kiocb *lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb,
+ u32 key)
{
struct list_head *pos;
/* TODO: use a hash or array, this sucks. */
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-06 07:23:20 +0000