linux-kernel - Re: [PATCH 0/3] f2fs: move proc files to debugfs

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Date:	Tue, 23 Oct 2012 12:11:35 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, arnd@...db.de, tytso@....edu,
	chur.lee@...sung.com, cm224.lee@...sung.com,
	jooyoung.hwang@...sung.com
Subject: Re: [PATCH 0/3] f2fs: move proc files to debugfs

On Tue, Oct 23, 2012 at 11:20:55AM -0700, Greg KH wrote:
> Here are 3 patches, moving the proc file usage on f2fs to debugfs.
> 
> The first one fixes a bug in the gc.h file preventing it from being able
> to be included by any other files.
> 
> The second patch moves all current proc file accesses to a single file,
> removing all #ifdefs from the .c files.  This should have been done in
> the first place.
> 
> The last file converts the files to use debugfs instead of proc.
> 
> Note, these patches have been compile tested only, I haven't tested them
> out, as I haven't had the chance to yet.  I'll go do that this afternoon
> after I catch up on some other pending kernel work.
> 
> One question, it seems that the proc files show all information for all
> super blocks in the system, no matter which subdirectory you are reading
> from in the proc f2fs tree.  Is that really what you want?  Shouldn't we
> only be showing the stats of the superblock we are saying we will
> report?  I'll test that later today, and if it really is wrong, will fix
> the debugfs code up to handle this properly.

I just tested your patch set, and it looks like I see all partition
information in each file, no matter what subdir it is in.

So, do you want this to be broken up per partition/superblock, in a
subdir, like you intended?  Or just 3 files, for all superblocks in the
system?

Oh, the third patch is buggy, don't apply it, I got the subdir logic
wrong, I'll go fix that up now.

thanks,

greg k-h
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