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dm bufio: remove dm_bufio_cond_resched() 

Use cond_resched() like everybody else.

Mikulas explained why dm_bufio_cond_resched() was introduced to begin
with (hopefully cond_resched can be improved accordingly) here:
https://www.redhat.com/archives/dm-devel/2016-September/msg00112.html

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Alasdair Kergon <agk@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com> # added last comment in header
This commit is contained in:
Peter Zijlstra 2016-09-13 10:45:20 +02:00 committed by Mike Snitzer
parent f659b10087
commit 7cd326747f
1 changed files with 9 additions and 22 deletions
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31
drivers/md/dm-bufio.c
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@ -191,19 +191,6 @@ static void dm_bufio_unlock(struct dm_bufio_client *c)
mutex_unlock(&c->lock);
}
/*
* FIXME Move to sched.h?
*/
#ifdef CONFIG_PREEMPT_VOLUNTARY
# define dm_bufio_cond_resched() \
do { \
if (unlikely(need_resched())) \
_cond_resched(); \
} while (0)
#else
# define dm_bufio_cond_resched() do { } while (0)
#endif
/*----------------------------------------------------------------*/
/*
@ -741,7 +728,7 @@ static void __flush_write_list(struct list_head *write_list)
list_entry(write_list->next, struct dm_buffer, write_list);
list_del(&b->write_list);
submit_io(b, WRITE, b->block, write_endio);
dm_bufio_cond_resched();
cond_resched();
}
blk_finish_plug(&plug);
}
@ -780,7 +767,7 @@ static struct dm_buffer *__get_unclaimed_buffer(struct dm_bufio_client *c)
__unlink_buffer(b);
return b;
}
dm_bufio_cond_resched();
cond_resched();
}
list_for_each_entry_reverse(b, &c->lru[LIST_DIRTY], lru_list) {
@ -791,7 +778,7 @@ static struct dm_buffer *__get_unclaimed_buffer(struct dm_bufio_client *c)
__unlink_buffer(b);
return b;
}
dm_bufio_cond_resched();
cond_resched();
}
return NULL;
@ -923,7 +910,7 @@ static void __write_dirty_buffers_async(struct dm_bufio_client *c, int no_wait,
return;
__write_dirty_buffer(b, write_list);
dm_bufio_cond_resched();
cond_resched();
}
}
@ -973,7 +960,7 @@ static void __check_watermark(struct dm_bufio_client *c,
return;
__free_buffer_wake(b);
dm_bufio_cond_resched();
cond_resched();
}
if (c->n_buffers[LIST_DIRTY] > threshold_buffers)
@ -1170,7 +1157,7 @@ void dm_bufio_prefetch(struct dm_bufio_client *c,
submit_io(b, READ, b->block, read_endio);
dm_bufio_release(b);
dm_bufio_cond_resched();
cond_resched();
if (!n_blocks)
goto flush_plug;
@ -1291,7 +1278,7 @@ again:
!test_bit(B_WRITING, &b->state))
__relink_lru(b, LIST_CLEAN);
dm_bufio_cond_resched();
cond_resched();
/*
* If we dropped the lock, the list is no longer consistent,
@ -1574,7 +1561,7 @@ static unsigned long __scan(struct dm_bufio_client *c, unsigned long nr_to_scan,
freed++;
if (!--nr_to_scan || ((count - freed) <= retain_target))
return freed;
dm_bufio_cond_resched();
cond_resched();
}
}
return freed;
@ -1808,7 +1795,7 @@ static void __evict_old_buffers(struct dm_bufio_client *c, unsigned long age_hz)
if (__try_evict_buffer(b, 0))
count--;
dm_bufio_cond_resched();
cond_resched();
}
dm_bufio_unlock(c);