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-rw-r--r--block/cfq-iosched.c34
-rw-r--r--block/ll_rw_blk.c30
2 files changed, 37 insertions, 27 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 13553e015d7..533af75329e 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -199,7 +199,7 @@ CFQ_CFQQ_FNS(sync);
static void cfq_dispatch_insert(struct request_queue *, struct request *);
static struct cfq_queue *cfq_get_queue(struct cfq_data *, int,
- struct task_struct *, gfp_t);
+ struct io_context *, gfp_t);
static struct cfq_io_context *cfq_cic_rb_lookup(struct cfq_data *,
struct io_context *);
@@ -1273,7 +1273,7 @@ cfq_alloc_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
return cic;
}
-static void cfq_init_prio_data(struct cfq_queue *cfqq)
+static void cfq_init_prio_data(struct cfq_queue *cfqq, struct io_context *ioc)
{
struct task_struct *tsk = current;
int ioprio_class;
@@ -1281,7 +1281,7 @@ static void cfq_init_prio_data(struct cfq_queue *cfqq)
if (!cfq_cfqq_prio_changed(cfqq))
return;
- ioprio_class = IOPRIO_PRIO_CLASS(tsk->ioprio);
+ ioprio_class = IOPRIO_PRIO_CLASS(ioc->ioprio);
switch (ioprio_class) {
default:
printk(KERN_ERR "cfq: bad prio %x\n", ioprio_class);
@@ -1293,11 +1293,11 @@ static void cfq_init_prio_data(struct cfq_queue *cfqq)
cfqq->ioprio_class = IOPRIO_CLASS_BE;
break;
case IOPRIO_CLASS_RT:
- cfqq->ioprio = task_ioprio(tsk);
+ cfqq->ioprio = task_ioprio(ioc);
cfqq->ioprio_class = IOPRIO_CLASS_RT;
break;
case IOPRIO_CLASS_BE:
- cfqq->ioprio = task_ioprio(tsk);
+ cfqq->ioprio = task_ioprio(ioc);
cfqq->ioprio_class = IOPRIO_CLASS_BE;
break;
case IOPRIO_CLASS_IDLE:
@@ -1330,8 +1330,7 @@ static inline void changed_ioprio(struct cfq_io_context *cic)
cfqq = cic->cfqq[ASYNC];
if (cfqq) {
struct cfq_queue *new_cfqq;
- new_cfqq = cfq_get_queue(cfqd, ASYNC, cic->ioc->task,
- GFP_ATOMIC);
+ new_cfqq = cfq_get_queue(cfqd, ASYNC, cic->ioc, GFP_ATOMIC);
if (new_cfqq) {
cic->cfqq[ASYNC] = new_cfqq;
cfq_put_queue(cfqq);
@@ -1363,13 +1362,13 @@ static void cfq_ioc_set_ioprio(struct io_context *ioc)
static struct cfq_queue *
cfq_find_alloc_queue(struct cfq_data *cfqd, int is_sync,
- struct task_struct *tsk, gfp_t gfp_mask)
+ struct io_context *ioc, gfp_t gfp_mask)
{
struct cfq_queue *cfqq, *new_cfqq = NULL;
struct cfq_io_context *cic;
retry:
- cic = cfq_cic_rb_lookup(cfqd, tsk->io_context);
+ cic = cfq_cic_rb_lookup(cfqd, ioc);
/* cic always exists here */
cfqq = cic_to_cfqq(cic, is_sync);
@@ -1412,7 +1411,7 @@ retry:
cfq_mark_cfqq_prio_changed(cfqq);
cfq_mark_cfqq_queue_new(cfqq);
- cfq_init_prio_data(cfqq);
+ cfq_init_prio_data(cfqq, ioc);
}
if (new_cfqq)
@@ -1439,11 +1438,11 @@ cfq_async_queue_prio(struct cfq_data *cfqd, int ioprio_class, int ioprio)
}
static struct cfq_queue *
-cfq_get_queue(struct cfq_data *cfqd, int is_sync, struct task_struct *tsk,
+cfq_get_queue(struct cfq_data *cfqd, int is_sync, struct io_context *ioc,
gfp_t gfp_mask)
{
- const int ioprio = task_ioprio(tsk);
- const int ioprio_class = task_ioprio_class(tsk);
+ const int ioprio = task_ioprio(ioc);
+ const int ioprio_class = task_ioprio_class(ioc);
struct cfq_queue **async_cfqq = NULL;
struct cfq_queue *cfqq = NULL;
@@ -1453,7 +1452,7 @@ cfq_get_queue(struct cfq_data *cfqd, int is_sync, struct task_struct *tsk,
}
if (!cfqq) {
- cfqq = cfq_find_alloc_queue(cfqd, is_sync, tsk, gfp_mask);
+ cfqq = cfq_find_alloc_queue(cfqd, is_sync, ioc, gfp_mask);
if (!cfqq)
return NULL;
}
@@ -1793,7 +1792,7 @@ static void cfq_insert_request(struct request_queue *q, struct request *rq)
struct cfq_data *cfqd = q->elevator->elevator_data;
struct cfq_queue *cfqq = RQ_CFQQ(rq);
- cfq_init_prio_data(cfqq);
+ cfq_init_prio_data(cfqq, RQ_CIC(rq)->ioc);
cfq_add_rq_rb(rq);
@@ -1900,7 +1899,7 @@ static int cfq_may_queue(struct request_queue *q, int rw)
cfqq = cic_to_cfqq(cic, rw & REQ_RW_SYNC);
if (cfqq) {
- cfq_init_prio_data(cfqq);
+ cfq_init_prio_data(cfqq, cic->ioc);
cfq_prio_boost(cfqq);
return __cfq_may_queue(cfqq);
@@ -1938,7 +1937,6 @@ static int
cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
- struct task_struct *tsk = current;
struct cfq_io_context *cic;
const int rw = rq_data_dir(rq);
const int is_sync = rq_is_sync(rq);
@@ -1956,7 +1954,7 @@ cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
cfqq = cic_to_cfqq(cic, is_sync);
if (!cfqq) {
- cfqq = cfq_get_queue(cfqd, is_sync, tsk, gfp_mask);
+ cfqq = cfq_get_queue(cfqd, is_sync, cic->ioc, gfp_mask);
if (!cfqq)
goto queue_fail;
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 3d0422f4845..b9bb02e845c 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -3904,6 +3904,26 @@ void exit_io_context(void)
put_io_context(ioc);
}
+struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
+{
+ struct io_context *ret;
+
+ ret = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
+ if (ret) {
+ atomic_set(&ret->refcount, 1);
+ ret->task = current;
+ ret->ioprio_changed = 0;
+ ret->ioprio = 0;
+ ret->last_waited = jiffies; /* doesn't matter... */
+ ret->nr_batch_requests = 0; /* because this is 0 */
+ ret->aic = NULL;
+ ret->cic_root.rb_node = NULL;
+ ret->ioc_data = NULL;
+ }
+
+ return ret;
+}
+
/*
* If the current task has no IO context then create one and initialise it.
* Otherwise, return its existing IO context.
@@ -3921,16 +3941,8 @@ static struct io_context *current_io_context(gfp_t gfp_flags, int node)
if (likely(ret))
return ret;
- ret = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
+ ret = alloc_io_context(gfp_flags, node);
if (ret) {
- atomic_set(&ret->refcount, 1);
- ret->task = current;
- ret->ioprio_changed = 0;
- ret->last_waited = jiffies; /* doesn't matter... */
- ret->nr_batch_requests = 0; /* because this is 0 */
- ret->aic = NULL;
- ret->cic_root.rb_node = NULL;
- ret->ioc_data = NULL;
/* make sure set_task_ioprio() sees the settings above */
smp_wmb();
tsk->io_context = ret;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 19:01:44 +0000