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Don't access task structure once we call task function.

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The task structure might be no longer available.
This also allows to eliminates the need for two tasks in the zio structure.

Submitted by:	anonymous
MFC after:	2 weeks
This commit is contained in:
pjd 2011-05-24 20:07:15 +00:00
parent 3c1a24d701
commit 32c533f982
4 changed files with 3 additions and 20 deletions
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5
sys/cddl/compat/opensolaris/kern/opensolaris_taskq.c
View File

@ -147,9 +147,7 @@ taskq_run_safe(void *arg, int pending __unused)
{
struct ostask *task = arg;
ASSERT(task->ost_magic == TASKQ_MAGIC);
task->ost_func(task->ost_arg);
task->ost_magic = 0;
}
taskqid_t
@ -158,15 +156,12 @@ taskq_dispatch_safe(taskq_t *tq, task_func_t func, void *arg, u_int flags,
{
int prio;
ASSERT(task->ost_magic != TASKQ_MAGIC);
/*
* If TQ_FRONT is given, we want higher priority for this task, so it
* can go at the front of the queue.
*/
prio = !!(flags & TQ_FRONT);
task->ost_magic = TASKQ_MAGIC;
task->ost_func = func;
task->ost_arg = arg;

1
sys/cddl/compat/opensolaris/sys/taskq.h
View File

@ -35,7 +35,6 @@ struct ostask {
struct task ost_task;
task_func_t *ost_func;
void *ost_arg;
int ost_magic;
};
taskqid_t taskq_dispatch_safe(taskq_t *tq, task_func_t func, void *arg,

3
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h
View File

@ -421,8 +421,7 @@ struct zio {
#ifdef _KERNEL
/* FreeBSD only. */
struct ostask io_task_issue;
struct ostask io_task_interrupt;
struct ostask io_task;
#endif
};

14
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c
View File

@ -1068,19 +1068,9 @@ zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type q, boolean_t cutinline)
spa_t *spa = zio->io_spa;
zio_type_t t = zio->io_type;
int flags = TQ_SLEEP | (cutinline ? TQ_FRONT : 0);
#ifdef _KERNEL
struct ostask *task;
#endif
ASSERT(q == ZIO_TASKQ_ISSUE || q == ZIO_TASKQ_INTERRUPT);
#ifdef _KERNEL
if (q == ZIO_TASKQ_ISSUE)
task = &zio->io_task_issue;
else /* if (q == ZIO_TASKQ_INTERRUPT) */
task = &zio->io_task_interrupt;
#endif
/*
* If we're a config writer or a probe, the normal issue and
* interrupt threads may all be blocked waiting for the config lock.
@ -1105,7 +1095,7 @@ zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type q, boolean_t cutinline)
ASSERT3U(q, <, ZIO_TASKQ_TYPES);
#ifdef _KERNEL
(void) taskq_dispatch_safe(spa->spa_zio_taskq[t][q],
(task_func_t *)zio_execute, zio, flags, task);
(task_func_t *)zio_execute, zio, flags, &zio->io_task);
#else
(void) taskq_dispatch(spa->spa_zio_taskq[t][q],
(task_func_t *)zio_execute, zio, flags);
@ -2904,7 +2894,7 @@ zio_done(zio_t *zio)
(void) taskq_dispatch_safe(
spa->spa_zio_taskq[ZIO_TYPE_CLAIM][ZIO_TASKQ_ISSUE],
(task_func_t *)zio_reexecute, zio, TQ_SLEEP,
&zio->io_task_issue);
&zio->io_task);
#else
(void) taskq_dispatch(
spa->spa_zio_taskq[ZIO_TYPE_CLAIM][ZIO_TASKQ_ISSUE],