linux-kernel - Re: [PATCH v4 3/3] btrfs: qgroup: fix sleep from invalid context bug in update_qgroup_limit

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Message-ID: <bf18a091-f0ae-1b74-5be4-c34644429bc7@huawei.com>
Date:   Wed, 16 Nov 2022 00:22:20 +0800
From:   ChenXiaoSong <chenxiaosong2@...wei.com>
To:     <clm@...com>, <josef@...icpanda.com>, <dsterba@...e.com>
CC:     <linux-btrfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <zhangxiaoxu5@...wei.com>, <yanaijie@...wei.com>,
        <quwenruo.btrfs@....com>, <wqu@...e.com>
Subject: Re: [PATCH v4 3/3] btrfs: qgroup: fix sleep from invalid context bug
 in update_qgroup_limit_item()

在 2022/11/16 1:17, ChenXiaoSong 写道:
> @@ -2987,6 +2986,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
>   		dstgroup->max_excl = srcgroup->max_excl;
>   		dstgroup->rsv_rfer = srcgroup->rsv_rfer;
>   		dstgroup->rsv_excl = srcgroup->rsv_excl;
> +		update_limit = false;
>   
>   		qgroup_dirty(fs_info, dstgroup);
>   		qgroup_dirty(fs_info, srcgroup);

No need to call update_qgroup_limit_item() when condition "if (srcid)" 
is true according to Qu Wenruo's suggestions, btrfs_run_qgroups() will 
update the quota tree to reflect the result after calling qgroup_dirty().