From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Rowand Subject: Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Date: Wed, 19 Apr 2017 22:13:13 -0700 Message-ID: <58F84369.3080304@gmail.com> References: <1492475525-10827-1-git-send-email-tyreld@linux.vnet.ibm.com> <58F6AA35.2040902@gmail.com> <87efwp6v4e.fsf@concordia.ellerman.id.au> <1d51a229-612b-bf09-93d5-6e43b476e2cf@gmail.com> <58F83C66.7030806@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <58F83C66.7030806-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Tyrel Datwyler , Michael Ellerman , Tyrel Datwyler , robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org Cc: linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, nfont-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org, rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org List-Id: devicetree@vger.kernel.org On 04/19/17 21:43, Frank Rowand wrote: > On 04/19/17 16:27, Tyrel Datwyler wrote: >> On 04/18/2017 06:31 PM, Michael Ellerman wrote: < snip > >> >> To get that same info as far as I know is to add a dump_stack() after >> each pr_debug. > > Here is a patch that I have used. It is not as user friendly in terms > of human readable stack traces (though a very small user space program > should be able to fix that). The patch is cut and pasted into this > email, so probably white space damaged. < snip > > + > + if (node) { > + int k; > + int refcount = refcount_read(&node->kobj.kref.refcount); > + pr_err("XXX get 0x%p %3d [0x%08lx 0x%08lx 0x%08lx 0x%08lx 0x%08lx 0x%08lx] ", > + node, refcount, If this was a real patch, meant for people other than myself, the pr_err() would instead be pr_debug(). -Frank < snip > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html