On Tue, Aug 07, 2018 at 06:19:12PM +0200, David Sterba wrote:
>On Sat, Aug 04, 2018 at 09:10:54PM +0800, Lu Fengqi wrote:
>> After btrfs_qgroup_reserve_meta_prealloc(), num_bytes will be assigned
>> again by btrfs_calc_trans_metadata_size(). Therefore, once block_rsv
>> fails, we cannot properly free the num_bytes of the previous
>> qgroup_reserve.
>
>This does not look like a trivial cleanup at all. There was an unused
>parameter, removed in c4c129db5da8f070147f175 ("btrfs: drop unused
>parameter qgroup_reserved"), that introduced the bug. This was in this
>rc1 so it's a regression and I'll consider pushing it to the 4.18 final.
>
>
I apologize for the inconvenience. I should add the Fixes tag, and really
shouldn't mix it into the trivial cleanup patch set.
--
Thanks,
Lu
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