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35 lines
609 B
C
35 lines
609 B
C
#ifndef _BCACHE_CLOCK_TYPES_H
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#define _BCACHE_CLOCK_TYPES_H
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#include "util.h"
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#define NR_IO_TIMERS 8
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/*
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* Clocks/timers in units of sectors of IO:
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*
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* Note - they use percpu batching, so they're only approximate.
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*/
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struct io_timer;
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typedef void (*io_timer_fn)(struct io_timer *);
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struct io_timer {
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io_timer_fn fn;
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unsigned long expire;
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};
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/* Amount to buffer up on a percpu counter */
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#define IO_CLOCK_PCPU_SECTORS 128
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struct io_clock {
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atomic_long_t now;
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u16 __percpu *pcpu_buf;
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spinlock_t timer_lock;
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DECLARE_HEAP(struct io_timer *, timers);
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};
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#endif /* _BCACHE_CLOCK_TYPES_H */
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