linux-kernel - Re: [PATCH] Revert "f2fs: use printk_ratelimited for f2fs

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Date:   Tue, 14 Aug 2018 20:01:14 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, chao@...nel.org
Subject: Re: [PATCH] Revert "f2fs: use printk_ratelimited for f2fs_msg"

On 08/15, Chao Yu wrote:
> On 2018/8/15 1:09, Jaegeuk Kim wrote:
> > On 08/13, Chao Yu wrote:
> >> Don't limit printing log, so that we will not miss any key messages.
> > 
> > For example, this can avoid lots of messages during roll-forward recovery.
> 
> That's really important evidence that can prove filesystem didn't lose last
> fsynced data, when file/data is missing after SPO, otherwise, filesystem will
> still be treated as suspect... :(

It's too bad that we need to rely on kernel messages for that purpose. Anyway,
if so, we may need to use printk() for essential messages only.

> 
> Thanks,
> 
> > 
> >>
> >> This reverts commit a36c106dffb616250117efb1cab271c19a8f94ff.
> >>
> >> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> >> ---
> >>  fs/f2fs/super.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> >> index bf4c919fe418..3d89d94191e7 100644
> >> --- a/fs/f2fs/super.c
> >> +++ b/fs/f2fs/super.c
> >> @@ -209,7 +209,7 @@ void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
> >>  	va_start(args, fmt);
> >>  	vaf.fmt = fmt;
> >>  	vaf.va = &args;
> >> -	printk_ratelimited("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
> >> +	printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
> >>  	va_end(args);
> >>  }
> >>  
> >> -- 
> >> 2.18.0.rc1
> > 
> > .
> >