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From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Cc: linux-ext4@vger.kernel.org
Subject: Re: [PATCH v9 2/9] ext4: add fast_commit feature and handling for extended mount options
Date: Fri, 9 Oct 2020 13:58:36 -0400
Message-ID: <20201009175836.GM235506@mit.edu> (raw)
In-Reply-To: <20200919005451.3899779-3-harshadshirwadkar@gmail.com>

On Fri, Sep 18, 2020 at 05:54:44PM -0700, Harshad Shirwadkar wrote:
> We are running out of mount option bits. Add handling for using
> s_mount_opt2. Add ext4 and jbd2 fast commit feature flag and also add
> ability to turn on / off the fast commit feature in Ext4.

Shouldn't that read "...ability to turn off the fast commit feature via a
mount option"?

> @@ -2207,10 +2211,17 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
>  			WARN_ON(1);
>  			return -1;
>  		}
> -		if (arg != 0)
> -			sbi->s_mount_opt |= m->mount_opt;
> -		else
> -			sbi->s_mount_opt &= ~m->mount_opt;
> +		if (m->flags & MOPT_2) {
> +			if (arg != 0)
> +				sbi->s_mount_opt2 |= m->mount_opt;
> +			else
> +				sbi->s_mount_opt2 &= ~m->mount_opt;
> +		} else {
> +			if (arg != 0)
> +				sbi->s_mount_opt |= m->mount_opt;
> +			else
> +				sbi->s_mount_opt &= ~m->mount_opt;
> +		}
>  	}
>  	return 1;
>  }


This requires a matching change in _ext4_show_options(), so that the
MOPT_2 options are properly displayed in /proc/mounts.

						- Ted

  reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-19  0:54 [PATCH v9 0/9] ext4: add fast commits feature Harshad Shirwadkar
2020-09-19  0:54 ` [PATCH v9 1/9] doc: update ext4 and journalling docs to include fast commit feature Harshad Shirwadkar
2020-09-22 17:50   ` Darrick J. Wong
2020-09-24  6:56     ` harshad shirwadkar
2020-10-09 18:28   ` Theodore Y. Ts'o
2020-10-13  0:27     ` harshad shirwadkar
2020-09-19  0:54 ` [PATCH v9 2/9] ext4: add fast_commit feature and handling for extended mount options Harshad Shirwadkar
2020-10-09 17:58   ` Theodore Y. Ts'o [this message]
2020-10-13  0:27     ` harshad shirwadkar
2020-09-19  0:54 ` [PATCH v9 3/9] ext4 / jbd2: add fast commit initialization Harshad Shirwadkar
2020-09-19 15:22   ` kernel test robot
2020-10-09 16:10   ` Ritesh Harjani
2020-10-13  0:28     ` harshad shirwadkar
2020-09-19  0:54 ` [PATCH v9 4/9] jbd2: add fast commit machinery Harshad Shirwadkar
2020-10-09 16:16   ` Ritesh Harjani
2020-10-13  0:27     ` harshad shirwadkar
2020-09-19  0:54 ` [PATCH v9 5/9] ext4: main fast-commit commit path Harshad Shirwadkar
2020-09-19  8:19   ` kernel test robot
2020-10-09 17:04   ` Ritesh Harjani
2020-10-13  0:25     ` harshad shirwadkar
2020-10-09 19:14   ` Theodore Y. Ts'o
2020-10-13  0:27     ` harshad shirwadkar
2020-09-19  0:54 ` [PATCH v9 6/9] jbd2: fast commit recovery path Harshad Shirwadkar
2020-09-19  0:54 ` [PATCH v9 7/9] ext4: " Harshad Shirwadkar
2020-09-19 14:15   ` kernel test robot
2020-10-09 17:14   ` Ritesh Harjani
2020-10-13  0:27     ` harshad shirwadkar
2020-09-19  0:54 ` [PATCH v9 8/9] ext4: add a mount opt to forcefully turn fast commits on Harshad Shirwadkar
2020-09-19  0:54 ` [PATCH v9 9/9] ext4: add fast commit stats in procfs Harshad Shirwadkar

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