Re: [linux-usb-devel] [PATCH] usbmon: add binary interface

Alan Stern
2006-10-11T20:51:11Z

On Wed, 11 Oct 2006, Pete Zaitcev wrote:

> On Wed, 11 Oct 2006 19:44:43 +0000, Pavel Machek <pavel@suse.cz> wrote:
>
> > Does it mean text interface is now deprecated? Or perhaps ioctl should
> > be added to text interface too? Or maybe we do not need binary
> > interface if we allow resizing on text interface?
>
> I haven't reviewed Paolo's patch yet, but with that in mind:
> - No, text is not deprecated yet. That is only possible when a simplified
> command-line tool is written and distributed (e.g. usbmon(8)).
> - No, I do not think an ioctl in debugfs or a text API is a good idea.
> - Resizing on text interface magnifies sprintf contribution to CPU burn,
> so once we have the binary one, there's only disadvantage and
> no advantage in implementing that.

Would relayfs be a better choice than debugfs for exporting potentially
large quantities of binary data?

Alan Stern