linux-ext4 - Re: [PATCH 8/9] jbd2: remove dead check of JBD2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Sun, 12 May 2024 13:24:27 +0200
From: Jan Kara <jack@...e.cz>
To: Kemeng Shi <shikemeng@...weicloud.com>
Cc: tytso@....edu, jack@...e.com, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/9] jbd2: remove dead check of JBD2_UNMOUNT in kjournald2

On Mon 06-05-24 22:18:00, Kemeng Shi wrote:
> We always set JBD2_UNMOUNT with j_state_lock held in journal_kill_thread.
> In kjournald2, we check JBD2_UNMOUNT flag two times under the same
> j_state_lock. Then the second check is unnecessary.
> Also see comment in struct journal_s about lock rule of j_flags.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/jbd2/journal.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index e8f592fbd6e1..ce9004f40ffb 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -228,8 +228,6 @@ static int kjournald2(void *arg)
>  		if (transaction && time_after_eq(jiffies,
>  						transaction->t_expires))
>  			should_sleep = 0;
> -		if (journal->j_flags & JBD2_UNMOUNT)
> -			should_sleep = 0;
>  		if (should_sleep) {
>  			write_unlock(&journal->j_state_lock);
>  			schedule();
> -- 
> 2.30.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR