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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_CLOCK_TYPES_H
3#define _BCACHEFS_CLOCK_TYPES_H
4
5#include "util.h"
6
7#define NR_IO_TIMERS (BCH_SB_MEMBERS_MAX * 3)
8
9/*
10 * Clocks/timers in units of sectors of IO:
11 *
12 * Note - they use percpu batching, so they're only approximate.
13 */
14
15struct io_timer;
16typedef void (*io_timer_fn)(struct io_timer *);
17
18struct io_timer {
19 io_timer_fn fn;
20 unsigned long expire;
21};
22
23/* Amount to buffer up on a percpu counter */
24#define IO_CLOCK_PCPU_SECTORS 128
25
26typedef HEAP(struct io_timer *) io_timer_heap;
27
28struct io_clock {
29 atomic64_t now;
30 u16 __percpu *pcpu_buf;
31 unsigned max_slop;
32
33 spinlock_t timer_lock;
34 io_timer_heap timers;
35};
36
37#endif /* _BCACHEFS_CLOCK_TYPES_H */