linux-kernel - Re: [PATCH 9/9] jbd2: remove unnecessary "should

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Message-ID: <20240512112639.6sprlmgbm7jrazsv@quack3>
Date: Sun, 12 May 2024 13:26:39 +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 9/9] jbd2: remove unnecessary "should_sleep" in kjournald2

On Mon 06-05-24 22:18:01, Kemeng Shi wrote:
> We only need to sleep if no running transaction is expired. Simply remove
> unnecessary "should_sleep".
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>

Nice! Feel free to add:

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

								Honza

> ---
>  fs/jbd2/journal.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index ce9004f40ffb..65c6cfce9d92 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -220,15 +220,12 @@ static int kjournald2(void *arg)
>  		 * so we don't sleep
>  		 */
>  		DEFINE_WAIT(wait);
> -		int should_sleep = 1;
>  
>  		prepare_to_wait(&journal->j_wait_commit, &wait,
>  				TASK_INTERRUPTIBLE);
>  		transaction = journal->j_running_transaction;
> -		if (transaction && time_after_eq(jiffies,
> -						transaction->t_expires))
> -			should_sleep = 0;
> -		if (should_sleep) {
> +		if (transaction == NULL ||
> +		    time_before(jiffies, transaction->t_expires)) {
>  			write_unlock(&journal->j_state_lock);
>  			schedule();
>  			write_lock(&journal->j_state_lock);
> -- 
> 2.30.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR