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Date:	Wed, 11 Nov 2009 14:40:27 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Al Viro <viro@...IV.linux.org.uk>,
	"mingo@...e.hu" <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Kok, Auke-jan H" <auke-jan.h.kok@...el.com>
Subject: Re: [PATCH] vfs: Add a trace point in the mark_inode_dirty function

On Wed, Nov 11, 2009 at 02:34:56PM +0800, Arjan van de Ven wrote:
> On Wed, 11 Nov 2009 10:01:08 +0800
> Wu Fengguang <fengguang.wu@...el.com> wrote:
> 
> > Hi Arjan,
> > 
> > > +	TP_printk("task=%i (%s) file=%s dev=%s",
> > > +		__entry->pid, __entry->comm, __entry->file,
> > > __entry->dev)
> > 
> > Maybe this is enough for POWERTOP, however for general use, the dirty
> > type(data/metadata) and inode number may be valuable to some users?
> 
> what can a user do with an inode number????

Hmm, maybe to tell one file from another in the trace stream :)
And maybe to compare it with other data sources, like "ls -i".

Thanks,
Fengguang
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