linux-kernel - Re: [PATCH UPDATED] jbd: Use printk_ratelimited() in journal_alloc_journal

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Date:	Mon, 4 Oct 2010 13:37:52 +0200
From:	Jan Kara <jack@...e.cz>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH UPDATED] jbd: Use printk_ratelimited() in
 journal_alloc_journal_head()

On Mon 04-10-10 12:31:45, Jan Kara wrote:
> On Mon 04-10-10 19:12:13, Namhyung Kim wrote:
> > Use printk_ratelimited() instead of doing it manually.
>   Thanks. I've merged the patch into my tree.
  Grumble, you apparently didn't try to compile the thing... The patch
was missing #include <linux/ratelimit.h>. I've fixed that up now. Please be
more careful next time. Thanks.

 								Honza
> 
> > 
> > Signed-off-by: Namhyung Kim <namhyung@...il.com>
> > ---
> >  fs/jbd/journal.c |    9 +++------
> >  1 files changed, 3 insertions(+), 6 deletions(-)
> > 
> > diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
> > index 6f20a75..f79767d 100644
> > --- a/fs/jbd/journal.c
> > +++ b/fs/jbd/journal.c
> > @@ -1718,7 +1718,6 @@ static void journal_destroy_journal_head_cache(void)
> >  static struct journal_head *journal_alloc_journal_head(void)
> >  {
> >  	struct journal_head *ret;
> > -	static unsigned long last_warning;
> >  
> >  #ifdef CONFIG_JBD_DEBUG
> >  	atomic_inc(&nr_journal_heads);
> > @@ -1726,11 +1725,9 @@ static struct journal_head *journal_alloc_journal_head(void)
> >  	ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
> >  	if (ret == NULL) {
> >  		jbd_debug(1, "out of memory for journal_head\n");
> > -		if (time_after(jiffies, last_warning + 5*HZ)) {
> > -			printk(KERN_NOTICE "ENOMEM in %s, retrying.\n",
> > -			       __func__);
> > -			last_warning = jiffies;
> > -		}
> > +		printk_ratelimited(KERN_NOTICE "ENOMEM in %s, retrying.\n",
> > +				   __func__);
> > +
> >  		while (ret == NULL) {
> >  			yield();
> >  			ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
> > -- 
> > 1.7.0.4
> > 
> -- 
> Jan Kara <jack@...e.cz>
> SUSE Labs, CR
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