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btrfs: zoned: reorder log node allocation on zoned filesystem

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This is the 3/3 patch to enable tree-log on zoned filesystems.

The allocation order of nodes of "fs_info->log_root_tree" and nodes of
"root->log_root" is not the same as the writing order of them. So, the
writing causes unaligned write errors.

Reorder the allocation of them by delaying allocation of the root node of
"fs_info->log_root_tree," so that the node buffers can go out sequentially
to devices.

Cc: Filipe Manana <fdmanana@gmail.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2021-02-04 19:22:20 +09:00 committed by David Sterba
parent fa1a0f42a0
commit 3ddebf27fc
2 changed files with 28 additions and 11 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
fs/btrfs/disk-io.c
View file

@ -1298,17 +1298,19 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_root *log_root;
int ret;
log_root = alloc_log_tree(trans, fs_info);
if (IS_ERR(log_root))
return PTR_ERR(log_root);
ret = btrfs_alloc_log_tree_node(trans, log_root);
if (!btrfs_is_zoned(fs_info)) {
int ret = btrfs_alloc_log_tree_node(trans, log_root);
if (ret) {
btrfs_put_root(log_root);
return ret;
}
}
WARN_ON(fs_info->log_root_tree);
fs_info->log_root_tree = log_root;

15
fs/btrfs/tree-log.c
View file

@ -3162,6 +3162,19 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
list_add_tail(&root_log_ctx.list, &log_root_tree->log_ctxs[index2]);
root_log_ctx.log_transid = log_root_tree->log_transid;
if (btrfs_is_zoned(fs_info)) {
mutex_lock(&fs_info->tree_root->log_mutex);
if (!log_root_tree->node) {
ret = btrfs_alloc_log_tree_node(trans, log_root_tree);
if (ret) {
mutex_unlock(&fs_info->tree_log_mutex);
mutex_unlock(&log_root_tree->log_mutex);
goto out;
}
}
mutex_unlock(&fs_info->tree_root->log_mutex);
}
/*
* Now we are safe to update the log_root_tree because we're under the
* log_mutex, and we're a current writer so we're holding the commit
@ -3320,6 +3333,7 @@ static void free_log_tree(struct btrfs_trans_handle *trans,
.process_func = process_one_buffer
};
if (log->node) {
ret = walk_log_tree(trans, log, &wc);
if (ret) {
if (trans)
@ -3327,6 +3341,7 @@ static void free_log_tree(struct btrfs_trans_handle *trans,
else
btrfs_handle_fs_error(log->fs_info, ret, NULL);
}
}
clear_extent_bits(&log->dirty_log_pages, 0, (u64)-1,
EXTENT_DIRTY | EXTENT_NEW | EXTENT_NEED_WAIT);