Re: [PATCH] quota: Turn quotas off when remounting read-only

[Andrew Morton <akpm@linux-foundation.org>]

On Thu, 7 Feb 2008 15:37:21 +0100 Jan Kara <jack@suse.cz> wrote:

> Turn off quotas before filesystem is remounted read only. Otherwise quota will
> try to write to read-only filesystem which does no good... We could also just
> refuse to remount ro when quota is enabled but turning quota off is consistent
> with what we do on umount.
> 
> Signed-off-by: Jan Kara <jack@suse.cz>
> ---
> Andrew, this should fix the hang reported... Please apply. Thanks.
> 
> diff --git a/fs/super.c b/fs/super.c
> index ceaf2e3..945c322 100644
> --- a/fs/super.c
> +++ b/fs/super.c
> @@ -603,6 +603,7 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
>  			mark_files_ro(sb);
>  		else if (!fs_may_remount_ro(sb))
>  			return -EBUSY;
> +		DQUOT_OFF(sb);
>  	}
>  
>  	if (sb->s_op->remount_fs) {

Cool.  And this is applicable to 2.6.23, 2.6.22 and even earlier, isn't it?