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| author | David Sterba <dsterba@suse.com> | 2018-01-10 17:13:07 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-01-22 18:08:21 +0300 |
| commit | e2683fc9d219430f5b78889b50cde7f40efeba7b (patch) | |
| tree | b8de1fa06788f0154a84dbf919a5b3f7e8421fd5 /fs/btrfs | |
| parent | 6670d4c2d9b7d352cbf90cd18c516bb6444acf34 (diff) | |
| download | linux-e2683fc9d219430f5b78889b50cde7f40efeba7b.tar.xz | |
btrfs: tree-check: reduce stack consumption in check_dir_item
I've noticed that the updated item checker stack consumption increased
dramatically in 542f5385e20cf97447 ("btrfs: tree-checker: Add checker
for dir item")
tree-checker.c:check_leaf +552 (176 -> 728)
The array is 255 bytes long, dynamic allocation would slow down the
sanity checks so it's more reasonable to keep it on-stack. Moving the
variable to the scope of use reduces the stack usage again
tree-checker.c:check_leaf -264 (728 -> 464)
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/tree-checker.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index 7c55e3ba5a6c..c3c8d48f6618 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -259,7 +259,6 @@ static int check_dir_item(struct btrfs_root *root, di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item); while (cur < item_size) { - char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)]; u32 name_len; u32 data_len; u32 max_name_len; @@ -342,6 +341,8 @@ static int check_dir_item(struct btrfs_root *root, */ if (key->type == BTRFS_DIR_ITEM_KEY || key->type == BTRFS_XATTR_ITEM_KEY) { + char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)]; + read_extent_buffer(leaf, namebuf, (unsigned long)(di + 1), name_len); name_hash = btrfs_name_hash(namebuf, name_len); |