f8a1a583eb
Commit 8ac9b0d33e5c0a995338ee5f25fe1b6ff7d97f65 upstream.
getrusage() does a lot more than what the SQPOLL accounting needs, the
latter only cares about (and uses) the stime. Rather than do a full
RUSAGE_SELF summation, just query the used stime instead.
Cc: stable@vger.kernel.org
Fixes: 3fcb9d1720 ("io_uring/sqpoll: statistics of the true utilization of sq threads")
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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struct io_sq_data {
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refcount_t refs;
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atomic_t park_pending;
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struct mutex lock;
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/* ctx's that are using this sqd */
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struct list_head ctx_list;
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struct task_struct __rcu *thread;
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struct wait_queue_head wait;
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unsigned sq_thread_idle;
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int sq_cpu;
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pid_t task_pid;
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pid_t task_tgid;
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u64 work_time;
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unsigned long state;
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struct completion exited;
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};
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int io_sq_offload_create(struct io_ring_ctx *ctx, struct io_uring_params *p);
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void io_sq_thread_finish(struct io_ring_ctx *ctx);
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void io_sq_thread_stop(struct io_sq_data *sqd);
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void io_sq_thread_park(struct io_sq_data *sqd);
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void io_sq_thread_unpark(struct io_sq_data *sqd);
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void io_put_sq_data(struct io_sq_data *sqd);
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void io_sqpoll_wait_sq(struct io_ring_ctx *ctx);
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int io_sqpoll_wq_cpu_affinity(struct io_ring_ctx *ctx, cpumask_var_t mask);
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u64 io_sq_cpu_usec(struct task_struct *tsk);
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static inline struct task_struct *sqpoll_task_locked(struct io_sq_data *sqd)
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{
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return rcu_dereference_protected(sqd->thread,
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lockdep_is_held(&sqd->lock));
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}
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