Re: [PATCH 4/4] relayfs: Documentation for exported relay fileops

[Greg KH <gregkh@suse.de>]

On Wed, Nov 09, 2005 at 04:37:13PM -0600, Tom Zanussi wrote:
> Andrew Morton writes:
>  > Tom Zanussi <zanussi@us.ibm.com> wrote:
>  > >
>  > > +By default of course, relay_open() creates relay files in the relayfs
>  > >  +filesystem.  Because relay_file_operations is exported, however, it's
>  > >  +also possible to create and use relay files in other pseudo-filesytems
>  > >  +such as debugfs.
>  > 
>  > Why would anyone wish to place relayfs files within other
> filesystems?
> 
> The reason they're exported is that when relayfs was being considered
> for inclusion, GregKH requested that the relay file operations be
> exported, which I did but didn't actually try to use them there until
> now.  It turns out that the current patch's changes are needed in
> order to be able to do that.  The reason behind being able to do this
> I assume is so that developers can use relay files do ad hoc tracing
> inside debugfs rather than have part of their application in debugfs
> and another part in relayfs.  Maybe Greg can chime in as to whether he
> thinks it's still useful

Yes, I still think that is very useful to have.  The relayfs core code
shouldn't rely on what filesystem is is placed into.

Thanks for doing this, I appreciate it.

greg k-h