Date: Tue, 14 Mar 2017 15:59:51 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r315267 - in stable/11/sys: kern sys Message-ID: <201703141559.v2EFxp2G018127@repo.freebsd.org>
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Author: hselasky Date: Tue Mar 14 15:59:51 2017 New Revision: 315267 URL: https://svnweb.freebsd.org/changeset/base/315267 Log: MFC r314553: Implement taskqueue_poll_is_busy() for use by the LinuxKPI. Refer to comment above function for a detailed description. Discussed with: kib @ Sponsored by: Mellanox Technologies Modified: stable/11/sys/kern/subr_taskqueue.c stable/11/sys/sys/taskqueue.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/subr_taskqueue.c ============================================================================== --- stable/11/sys/kern/subr_taskqueue.c Tue Mar 14 15:58:01 2017 (r315266) +++ stable/11/sys/kern/subr_taskqueue.c Tue Mar 14 15:59:51 2017 (r315267) @@ -487,6 +487,23 @@ task_is_running(struct taskqueue *queue, return (0); } +/* + * Only use this function in single threaded contexts. It returns + * non-zero if the given task is either pending or running. Else the + * task is idle and can be queued again or freed. + */ +int +taskqueue_poll_is_busy(struct taskqueue *queue, struct task *task) +{ + int retval; + + TQ_LOCK(queue); + retval = task->ta_pending > 0 || task_is_running(queue, task); + TQ_UNLOCK(queue); + + return (retval); +} + static int taskqueue_cancel_locked(struct taskqueue *queue, struct task *task, u_int *pendp) Modified: stable/11/sys/sys/taskqueue.h ============================================================================== --- stable/11/sys/sys/taskqueue.h Tue Mar 14 15:58:01 2017 (r315266) +++ stable/11/sys/sys/taskqueue.h Tue Mar 14 15:59:51 2017 (r315267) @@ -79,6 +79,7 @@ int taskqueue_start_threads_cpuset(struc int taskqueue_enqueue(struct taskqueue *queue, struct task *task); int taskqueue_enqueue_timeout(struct taskqueue *queue, struct timeout_task *timeout_task, int ticks); +int taskqueue_poll_is_busy(struct taskqueue *queue, struct task *task); int taskqueue_cancel(struct taskqueue *queue, struct task *task, u_int *pendp); int taskqueue_cancel_timeout(struct taskqueue *queue,
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