Function aio_init_aioinfo

freebsd/kern/vfs_aio.c:436–467

* Init the per-process aioinfo structure. The aioinfo limits are set * per-process for user limit (resource) management. */

 * per-process for user limit (resource) management.
 */
void
aio_init_aioinfo(struct proc *p)
{
	struct kaioinfo *ki;

	ki = uma_zalloc(kaio_zone, M_WAITOK);
	mtx_init(&ki->kaio_mtx, "aiomtx", NULL, MTX_DEF | MTX_NEW);
	ki->kaio_flags = 0;
	ki->kaio_active_count = 0;
	ki->kaio_count = 0;
	ki->kaio_buffer_count = 0;
	TAILQ_INIT(&ki->kaio_all);
	TAILQ_INIT(&ki->kaio_done);
	TAILQ_INIT(&ki->kaio_jobqueue);
	TAILQ_INIT(&ki->kaio_liojoblist);
	TAILQ_INIT(&ki->kaio_syncqueue);
	TAILQ_INIT(&ki->kaio_syncready);
	TASK_INIT(&ki->kaio_task, 0, aio_kick_helper, p);
	TASK_INIT(&ki->kaio_sync_task, 0, aio_schedule_fsync, ki);
	PROC_LOCK(p);
	if (p->p_aioinfo == NULL) {
		p->p_aioinfo = ki;
		PROC_UNLOCK(p);
	} else {
		PROC_UNLOCK(p);
		mtx_destroy(&ki->kaio_mtx);
		uma_zfree(kaio_zone, ki);
	}

	while (num_aio_procs < MIN(target_aio_procs, max_aio_procs))
		aio_newproc(NULL);
}

static int
aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi, bool ext)