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078b8b90b8
There are two callbacks defined in btrfs_work but only two actually make
use of them, otherwise there are NULLs. We can get rid of the freeing
callback making it a special case of the normal work. This reduces the
size of btrfs_work by 8 bytes, final layout:
struct btrfs_work {
btrfs_func_t func; /* 0 8 */
btrfs_ordered_func_t ordered_func; /* 8 8 */
struct work_struct normal_work; /* 16 32 */
struct list_head ordered_list; /* 48 16 */
/* --- cacheline 1 boundary (64 bytes) --- */
struct btrfs_workqueue * wq; /* 64 8 */
long unsigned int flags; /* 72 8 */
/* size: 80, cachelines: 2, members: 6 */
/* last cacheline: 16 bytes */
};
This in turn reduces size of other structures (on a release config):
- async_chunk 160 -> 152
- async_submit_bio 152 -> 144
- btrfs_async_delayed_work 104 -> 96
- btrfs_caching_control 176 -> 168
- btrfs_delalloc_work 144 -> 136
- btrfs_fs_info 3608 -> 3600
- btrfs_ordered_extent 440 -> 424
- btrfs_writepage_fixup 104 -> 96
Signed-off-by: David Sterba <dsterba@suse.com>
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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* Copyright (C) 2014 Fujitsu. All rights reserved.
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*/
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#ifndef BTRFS_ASYNC_THREAD_H
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#define BTRFS_ASYNC_THREAD_H
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#include <linux/workqueue.h>
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struct btrfs_fs_info;
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struct btrfs_workqueue;
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struct btrfs_work;
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typedef void (*btrfs_func_t)(struct btrfs_work *arg);
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typedef void (*btrfs_ordered_func_t)(struct btrfs_work *arg, bool);
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struct btrfs_work {
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btrfs_func_t func;
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btrfs_ordered_func_t ordered_func;
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/* Don't touch things below */
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struct work_struct normal_work;
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struct list_head ordered_list;
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struct btrfs_workqueue *wq;
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unsigned long flags;
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};
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struct btrfs_workqueue *btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info,
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const char *name,
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unsigned int flags,
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int limit_active,
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int thresh);
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struct btrfs_workqueue *btrfs_alloc_ordered_workqueue(
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struct btrfs_fs_info *fs_info, const char *name,
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unsigned int flags);
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void btrfs_init_work(struct btrfs_work *work, btrfs_func_t func,
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btrfs_ordered_func_t ordered_func);
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void btrfs_queue_work(struct btrfs_workqueue *wq,
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struct btrfs_work *work);
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void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
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void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
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struct btrfs_fs_info * __pure btrfs_work_owner(const struct btrfs_work *work);
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struct btrfs_fs_info * __pure btrfs_workqueue_owner(const struct btrfs_workqueue *wq);
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bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
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void btrfs_flush_workqueue(struct btrfs_workqueue *wq);
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#endif
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