Subject: Re: [rfc] Describe events in a structured way via sysfs
From: Lin Ming <ming.m.lin@intel.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Ingo Molnar <mingo@elte.hu>, Peter Zijlstra <peterz@infradead.org>,
       Greg KH <greg@kroah.com>, Corey Ashford <cjashfor@linux.vnet.ibm.com>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       Paul Mundt <lethal@linux-sh.org>,
       "eranian@gmail.com" <eranian@gmail.com>,
       "Gary.Mohr@Bull.com" <Gary.Mohr@bull.com>,
       "arjan@linux.intel.com" <arjan@linux.intel.com>,
       "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
       Paul Mackerras <paulus@samba.org>,
       "David S. Miller" <davem@davemloft.net>,
       Russell King <rmk+kernel@arm.linux.org.uk>,
       Arnaldo Carvalho de Melo <acme@redhat.com>,
       Will Deacon <will.deacon@arm.com>, Maynard Johnson <mpjohn@us.ibm.com>,
       Carl Love <carll@us.ibm.com>, Kay Sievers <kay.sievers@vrfy.org>,
       lkml <linux-kernel@vger.kernel.org>,
       Thomas Gleixner <tglx@linutronix.de>
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Date: Tue, 22 Jun 2010 15:47:57 +0800
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On Tue, 2010-06-22 at 15:33 +0800, Johannes Berg wrote:
> On Tue, 2010-06-22 at 15:22 +0800, Lin Ming wrote:
> 
> > > > net/wlan0/events/
> > > > net/waln1/events/
> > > > ....
> > > > net/walnN/events/
> > > 
> > > That's not appropriate either though since you may have multiple network
> > > interfaces on the same hardware :)
> > 
> > Doesn't net/wlan0...wlanN mean multiple network interfaces on the same
> > hardware?
> 
> Yes, but the trace points aren't per network interface but rather per
> hardware piece.

So it can only trace the whole hardware piece rather than a specific
interface?

If yes, then will change to
- /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlan0/events/iwlwifi_dev_ioread32/
+ /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/events/iwlwifi_dev_ioread32/

> 
> johannes
> 

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