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Code Issues Releases Wiki Activity

btrfs: remove lock protection for BLOCK_GROUP_FLAG_TO_COPY

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We use this during device replace for zoned devices, we were simply
taking the lock because it was in a bit field and we needed the lock to
be safe with other modifications in the bitfield.  With the bit helpers
we no longer require that locking.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2022-07-15 15:45:25 -04:00 committed by David Sterba
parent 3349b57fd4
commit 9283b9e09a
3 changed files with 0 additions and 9 deletions
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5
fs/btrfs/dev-replace.c
View file

@ -545,10 +545,7 @@ static int mark_block_group_to_copy(struct btrfs_fs_info *fs_info,
if (!cache)
continue;
spin_lock(&cache->lock);
set_bit(BLOCK_GROUP_FLAG_TO_COPY, &cache->runtime_flags);
spin_unlock(&cache->lock);
btrfs_put_block_group(cache);
}
if (iter_ret < 0)
@ -610,9 +607,7 @@ bool btrfs_finish_block_group_to_copy(struct btrfs_device *srcdev,
}
/* Last stripe on this device */
spin_lock(&cache->lock);
clear_bit(BLOCK_GROUP_FLAG_TO_COPY, &cache->runtime_flags);
spin_unlock(&cache->lock);
return true;
}

2
fs/btrfs/scrub.c
View file

@ -3755,13 +3755,11 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
}
if (sctx->is_dev_replace && btrfs_is_zoned(fs_info)) {
spin_lock(&cache->lock);
if (!test_bit(BLOCK_GROUP_FLAG_TO_COPY, &cache->runtime_flags)) {
spin_unlock(&cache->lock);
btrfs_put_block_group(cache);
goto skip;
}
spin_unlock(&cache->lock);
}
/*

2
fs/btrfs/volumes.c
View file

@ -6153,9 +6153,7 @@ static bool is_block_group_to_copy(struct btrfs_fs_info *fs_info, u64 logical)
cache = btrfs_lookup_block_group(fs_info, logical);
spin_lock(&cache->lock);
ret = test_bit(BLOCK_GROUP_FLAG_TO_COPY, &cache->runtime_flags);
spin_unlock(&cache->lock);
btrfs_put_block_group(cache);
return ret;