linux-kernel - Re: [PATCH] pci: show dma

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Date:	Thu, 23 Oct 2008 13:36:52 -0600
From:	Grant Grundler <grundler@...isc-linux.org>
To:	Greg KH <greg@...ah.com>
Cc:	Grant Grundler <grundler@...isc-linux.org>,
	Matthew Wilcox <matthew@....cx>,
	Yinghai Lu <yinghai@...nel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH] pci: show dma_mask bits in /sys

On Thu, Oct 23, 2008 at 08:39:23AM -0700, Greg KH wrote:
> On Thu, Oct 23, 2008 at 12:44:12AM -0600, Grant Grundler wrote:
> > 
> > Lastly, /sys seems to have over run even /proc. On an rx2600 (ia64):
> > grundler@...prf3:/usr/src/linux-2.6$ find /sys ! -type d | wc
> >    6288    6296  264893
> 
> Is this causing some kind of problem for your systems?

Nope. Just an observation on the "forest" (vs individual "trees").

> /sys shows far more information than /proc does, so of course it would
> be larger in quantity.

Yes - and /sys is better organized (hierarchial in general).
But it's getting harder to find stuff because there is so much now.
Any comments on adding DMA attributes (e.g. dma_mask_bits) to /sys?

Willy has objected and I'm waiting to hear if he's ok with limiting
this to a DEBUG compile time flag.

thanks,
grant
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