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Date: Thu, 9 Sep 2010 13:40:59 +0200
From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Harald Gustafsson <hgu1972@gmail.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Harald Gustafsson <harald.gustafsson@ericsson.com>,
        Song Yuan <song.yuan@ericsson.com>,
        Steven Rostedt <rostedt@goodmis.org>
Subject: Re: perf events over (net) console?
Message-ID: <20100909114057.GB5267@nowhere>
References: <AANLkTi=yeHyOeewm9tdsHRtj+=d+vE5=NRKGaPyq_yGH@mail.gmail.com> <1284031141.402.1.camel@laptop> <20100909112940.GA5267@nowhere> <1284032142.402.5.camel@laptop>
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On Thu, Sep 09, 2010 at 01:35:42PM +0200, Peter Zijlstra wrote:
> On Thu, 2010-09-09 at 13:29 +0200, Frederic Weisbecker wrote:
> > But if we bring the splice support,
> 
> Even simply write() from the mmap() buffer isn't terribly expensive. But
> yeah, once we fix splice not to always copy that could be even better.
> 
> Splice() is on the todo list, but it needs significant user-interface
> work and I'm rather busy..


Yeah sure, that wasn't a citicism, just an idea on how that kind of
minimal userspace noise state can be achieved in the future :)