Re: [Qemu-devel] [PATCH v7 11/13] trace-state: [simple] disable all trace points by default

[Stefan Hajnoczi <stefanha@gmail.com>]

On Thu, Aug 25, 2011 at 09:18:43PM +0200, Lluís wrote:
> Note that this refers to the backend-specific state (whether the output must be
> generated), not the event "disabled" property (which always uses the "nop"
> backend).
> 
> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
> ---
>  scripts/tracetool |    9 ++-------
>  trace-events      |    3 ---
>  2 files changed, 2 insertions(+), 10 deletions(-)

At this point the quickstart in docs/tracing.txt may be confusing since
QEMU runs as normal but no events are recorded :).  Please add a step
before launching QEMU that creates a simple events file, like:
bdrv_aio_readv
bdrv_aio_writev

This way people looking at the quickstart know they need to choose
events that they would like to record and use -trace events=my-events.

Stefan