Re: Perf and ftrace [was Re: PyTimechart]

Peter Zijlstra
2010-05-12T19:01:25Z

On Wed, 2010-05-12 at 14:51 -0400, Mathieu Desnoyers wrote:
>
> It makes it hard to use splice() or read() if you don't specify the buffer size
> at creation time. That alone seems like a pretty good argument for fixing the
> size before the mmap() call.

Our read() doesn't actually provide the same data splice()/mmap() would.
But yeah, hence my proposal to create a separate syscall that creates
buffer objects.