linux-kernel - Re: [patch 11/11] ftrace plugin for kernel symbol tracing using HW Breakpoint interfaces

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Message-ID: <alpine.DEB.2.00.0903050959260.26101@gandalf.stny.rr.com>
Date:	Thu, 5 Mar 2009 10:00:02 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	prasad@...ux.vnet.ibm.com, mingo@...e.hu,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Roland McGrath <roland@...hat.com>
Subject: Re: [patch 11/11] ftrace plugin for kernel symbol tracing using HW
 Breakpoint interfaces


On Thu, 5 Mar 2009, Frederic Weisbecker wrote:
> >  
> > +struct trace_ksym {
> > +	struct trace_entry	ent;
> > +	struct hw_breakpoint	*ksym_hbkpt;
> > +	unsigned long		ksym_addr;
> > +	unsigned long		ip;
> > +	pid_t			pid;
> 
> 
> Just a doubt here.
> The current pid is automatically recorded on trace_buffer_lock_reserve()
> (or unlock_commit, don't remember), so if this pid is the current one, you
> don't need to reserve a room for it, current pid is on struct trace_entry.

Heh, I guess I should have read the rest of the thread before replying.
Frederic beat me to it ;-)

-- Steve
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