From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pawel Moll Subject: Re: [RFC 2/2] perf: Marker software event and ioctl Date: Mon, 15 Sep 2014 18:18:37 +0100 Message-ID: <1410801517.3817.13.camel@hornet> References: <1410522513-1045-1-git-send-email-pawel.moll@arm.com> <1410522513-1045-3-git-send-email-pawel.moll@arm.com> <54132F63.1010401@gmail.com> <20140912204444.GA11199@kernel.org> <5415B790.5010607@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5415B790.5010607-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: David Ahern Cc: Arnaldo Carvalho de Melo , Richard Cochran , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Paul Mackerras , John Stultz , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-api@vger.kernel.org On Sun, 2014-09-14 at 16:43 +0100, David Ahern wrote: > >> Seems really similar to what I proposed in the past: Yeah, it wasn't really hard to come with similar conclusions :-) > >> https://lkml.org/lkml/2011/2/27/159 > >> > >> Which was rejected. > > > > I took a look at that thread, but just barely, emphasis on that. > > > > Injecting something from userspace, a la ftrace, seems to be something, > > as tglx mentioned, "buried" in that patchset. > > Thomas object to an ioctl buried deep in a patch -- newbie mistake. > > Peter objected to the ioctl https://lkml.org/lkml/2011/3/1/229 > > It was not userspace injecting random data into the stream but rather > forcing the sample to be generated and added to the stream. I would like to hear from Peter and others. If not here, I'll get them to talk next month on Linux Plumbers :-) Pawel