Date: Thu, 26 Nov 2009 10:01:10 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "K.Prasad" <prasad@linux.vnet.ibm.com>,
       LKML <linux-kernel@vger.kernel.org>, Li Zefan <lizf@cn.fujitsu.com>,
       Alan Stern <stern@rowland.harvard.edu>,
       Peter Zijlstra <peterz@infradead.org>,
       Arnaldo Carvalho de Melo <acme@redhat.com>,
       Steven Rostedt <rostedt@goodmis.org>, Jan Kiszka <jan.kiszka@web.de>,
       Jiri Slaby <jirislaby@gmail.com>, Avi Kivity <avi@redhat.com>,
       Paul Mackerras <paulus@samba.org>, Mike Galbraith <efault@gmx.de>,
       Masami Hiramatsu <mhiramat@redhat.com>,
       Paul Mundt <lethal@linux-sh.org>,
       Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [GIT PULL v6] hw-breakpoints: Rewrite on top of perf events v6
Message-ID: <20091126090110.GD1389@elte.hu>
References: <1257694141-5670-1-git-send-email-fweisbec@gmail.com>
 <20091124094421.GA3468@in.ibm.com>
 <20091124101342.GB5570@elte.hu>
 <20091126054735.GA5649@nowhere>
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* Frederic Weisbecker <fweisbec@gmail.com> wrote:

> > Well we have PERF_TYPE_BREAKPOINT right now. I agree that it should 
> > be finalized in some sort of extensible ABI real soon - we dont want 
> > (and dont need to) add all features that might be possible in the 
> > future.
> 
> Concerning in-kernel users, it's not a worry. The in-kernel api is not 
> supposed to be stable and shouldn't, especially for such a very young 
> facility like generic breakpoints.

in-kernel we dont worry about indeed (we can change and iterate APIs 
freely there) - it is PERF_TYPE_BREAKPOINT that we need to make sure is 
extensible enough.

Thanks,

	Ingo
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