linux-ext4 - Re: [PATCH 9/9] jbd2: remove unnecessary "should

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Message-ID: <1f72fcda-a945-415e-0cb3-9de8de8efe60@huaweicloud.com>
Date: Thu, 9 May 2024 20:09:10 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: Kemeng Shi <shikemeng@...weicloud.com>
Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, tytso@....edu,
 jack@...e.com
Subject: Re: [PATCH 9/9] jbd2: remove unnecessary "should_sleep" in kjournald2

On 2024/5/6 22:18, 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>

It looks much clearer now.

Reviewed-by: Zhang Yi <yi.zhang@...wei.com>

> ---
>  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);
>