linux-kernel - Re: [PATCH] jbd2: stop waiting for space when jbd2_cleanup_journal

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Message-ID: <172476284019.635532.18117773418669271542.b4-ty@mit.edu>
Date: Tue, 27 Aug 2024 08:47:23 -0400
From: "Theodore Ts'o" <tytso@....edu>
To: linux-ext4@...r.kernel.org, libaokun@...weicloud.com
Cc: "Theodore Ts'o" <tytso@....edu>, jack@...e.cz,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com,
        yangerkun@...wei.com, Baokun Li <libaokun1@...wei.com>,
        stable@...nel.org
Subject: Re: [PATCH] jbd2: stop waiting for space when jbd2_cleanup_journal_tail() returns error


On Thu, 18 Jul 2024 19:53:36 +0800, libaokun@...weicloud.com wrote:
> In __jbd2_log_wait_for_space(), we might call jbd2_cleanup_journal_tail()
> to recover some journal space. But if an error occurs while executing
> jbd2_cleanup_journal_tail() (e.g., an EIO), we don't stop waiting for free
> space right away, we try other branches, and if j_committing_transaction
> is NULL (i.e., the tid is 0), we will get the following complain:
> 
> ============================================
> JBD2: I/O error when updating journal superblock for sdd-8.
> __jbd2_log_wait_for_space: needed 256 blocks and only had 217 space available
> __jbd2_log_wait_for_space: no way to get more journal space in sdd-8
> ------------[ cut here ]------------
> WARNING: CPU: 2 PID: 139804 at fs/jbd2/checkpoint.c:109 __jbd2_log_wait_for_space+0x251/0x2e0
> Modules linked in:
> CPU: 2 PID: 139804 Comm: kworker/u8:3 Not tainted 6.6.0+ #1
> RIP: 0010:__jbd2_log_wait_for_space+0x251/0x2e0
> Call Trace:
>  <TASK>
>  add_transaction_credits+0x5d1/0x5e0
>  start_this_handle+0x1ef/0x6a0
>  jbd2__journal_start+0x18b/0x340
>  ext4_dirty_inode+0x5d/0xb0
>  __mark_inode_dirty+0xe4/0x5d0
>  generic_update_time+0x60/0x70
> [...]
> ============================================
> 
> [...]

Applied, thanks!

[1/1] jbd2: stop waiting for space when jbd2_cleanup_journal_tail() returns error
      commit: f5cacdc6f2bb2a9bf214469dd7112b43dd2dd68a

Best regards,
-- 
Theodore Ts'o <tytso@....edu>