fs/bcachefs/clock_types.h

   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
  15 struct io_timer;
  16 typedef void (*io_timer_fn)(struct io_timer *);
  17
  18 struct io_timer {
  19         io_timer_fn             fn;
  20         void                    *fn2;
  21         u64                     expire;
  22 };
  23
  24 /* Amount to buffer up on a percpu counter */
  25 #define IO_CLOCK_PCPU_SECTORS   128
  26
  27 typedef DEFINE_MIN_HEAP(struct io_timer *, io_timer_heap)       io_timer_heap;
  28
  29 struct io_clock {
  30         atomic64_t              now;
  31         u16 __percpu            *pcpu_buf;
  32         unsigned                max_slop;
  33
  34         spinlock_t              timer_lock;
  35         io_timer_heap           timers;
  36 };
  37
  38 #endif /* _BCACHEFS_CLOCK_TYPES_H */