From: Lukas Czerner <lczerner@redhat.com>
Subject: Re: [PATCH v2] VFS: Handle lazytime in do_mount()
Date: Tue, 19 Sep 2017 17:25:00 +0200
Message-ID: <20170919152500.ce62nirm7gu3lqvq@rh_laptop>
References: <20170918192644.GA232@x4>
 <20170919083506.GA233@x4>
 <20170919101819.GA233@x4>
 <20170919103724.GA239@x4>
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Cc: Theodore Ts'o <tytso@mit.edu>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        linux-ext4@vger.kernel.org,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        David Howells <dhowells@redhat.com>
To: Markus Trippelsdorf <markus@trippelsdorf.de>
Return-path: <linux-kernel-owner@vger.kernel.org>
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In-Reply-To: <20170919103724.GA239@x4>
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On Tue, Sep 19, 2017 at 12:37:24PM +0200, Markus Trippelsdorf wrote:
> Since commit e462ec50cb5fa ("VFS: Differentiate mount flags (MS_*) from
> internal superblock flags") the lazytime mount option didn't get passed
> on anymore.
> 
> Fix the issue by handling the option in do_mount().
> 
> Signed-off-by: Markus Trippelsdorf <markus@trippelsdorf.de>
> ---
>  fs/namespace.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/namespace.c b/fs/namespace.c
> index 54059b142d6b..b633838b8f02 100644
> --- a/fs/namespace.c
> +++ b/fs/namespace.c
> @@ -2823,7 +2823,8 @@ long do_mount(const char *dev_name, const char __user *dir_name,
>  			    SB_MANDLOCK |
>  			    SB_DIRSYNC |
>  			    SB_SILENT |
> -			    SB_POSIXACL);
> +			    SB_POSIXACL |
> +			    SB_LAZYTIME);

Looks good. Although I still think that this can be per mountpoint options.

Regardless of that, you can add
Reviewed-by: Lukas Czerner <lczerner@redhat.com>

>  
>  	if (flags & MS_REMOUNT)
>  		retval = do_remount(&path, flags, sb_flags, mnt_flags,
> -- 
> Markus