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btrfs: switch to per-transaction pinned extents

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This commit flips the switch to start tracking/processing pinned extents
on a per-transaction basis. It mostly replaces all references from
btrfs_fs_info::(pinned_extents|freed_extents[]) to
btrfs_transaction::pinned_extents.

Two notable modifications that warrant explicit mention are changing
clean_pinned_extents to get a reference to the previously running
transaction. The other one is removal of call to
btrfs_destroy_pinned_extent since transactions are going to be cleaned
in btrfs_cleanup_one_transaction.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov
2020-01-20 16:09:18 +02:00
committed by David Sterba
parent 45bb5d6ae9
commit fe119a6eeb
9 changed files with 48 additions and 68 deletions
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31
fs/btrfs/extent-tree.c
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@@ -64,10 +64,8 @@ int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
u64 start, u64 num_bytes)
{
u64 end = start + num_bytes - 1;
set_extent_bits(&fs_info->freed_extents[0],
start, end, EXTENT_UPTODATE);
set_extent_bits(&fs_info->freed_extents[1],
start, end, EXTENT_UPTODATE);
set_extent_bits(&fs_info->excluded_extents, start, end,
EXTENT_UPTODATE);
return 0;
}
@@ -79,10 +77,8 @@ void btrfs_free_excluded_extents(struct btrfs_block_group *cache)
start = cache->start;
end = start + cache->length - 1;
clear_extent_bits(&fs_info->freed_extents[0],
start, end, EXTENT_UPTODATE);
clear_extent_bits(&fs_info->freed_extents[1],
start, end, EXTENT_UPTODATE);
clear_extent_bits(&fs_info->excluded_extents, start, end,
EXTENT_UPTODATE);
}
static u64 generic_ref_to_space_flags(struct btrfs_ref *ref)
@@ -2605,7 +2601,7 @@ static int pin_down_extent(struct btrfs_trans_handle *trans,
percpu_counter_add_batch(&cache->space_info->total_bytes_pinned,
num_bytes, BTRFS_TOTAL_BYTES_PINNED_BATCH);
set_extent_dirty(fs_info->pinned_extents, bytenr,
set_extent_dirty(&trans->transaction->pinned_extents, bytenr,
bytenr + num_bytes - 1, GFP_NOFS | __GFP_NOFAIL);
return 0;
}
@@ -2761,11 +2757,6 @@ void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info)
}
}
if (fs_info->pinned_extents == &fs_info->freed_extents[0])
fs_info->pinned_extents = &fs_info->freed_extents[1];
else
fs_info->pinned_extents = &fs_info->freed_extents[0];
up_write(&fs_info->commit_root_sem);
btrfs_update_global_block_rsv(fs_info);
@@ -2906,10 +2897,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans)
u64 end;
int ret;
if (fs_info->pinned_extents == &fs_info->freed_extents[0])
unpin = &fs_info->freed_extents[1];
else
unpin = &fs_info->freed_extents[0];
unpin = &trans->transaction->pinned_extents;
while (!TRANS_ABORTED(trans)) {
struct extent_state *cached_state = NULL;
@@ -2921,12 +2909,9 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans)
mutex_unlock(&fs_info->unused_bg_unpin_mutex);
break;
}
if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags)) {
clear_extent_bits(&fs_info->freed_extents[0], start,
if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags))
clear_extent_bits(&fs_info->excluded_extents, start,
end, EXTENT_UPTODATE);
clear_extent_bits(&fs_info->freed_extents[1], start,
end, EXTENT_UPTODATE);
}
if (btrfs_test_opt(fs_info, DISCARD_SYNC))
ret = btrfs_discard_extent(fs_info, start,