On Tue, Jan 12, 2021 at 09:44:03PM +0100, BALATON Zoltan wrote: > On Tue, 12 Jan 2021, Stefan Hajnoczi wrote: > > It is possible to repeat the --trace option to specify multiple > > patterns. This may be preferrable to users who do not want to create a > > file with a list of patterns. > > > > Suggested-by: BALATON Zoltan <bala...@eik.bme.hu> > > Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com> > > --- > > docs/devel/tracing.rst | 9 +++++++-- > > 1 file changed, 7 insertions(+), 2 deletions(-) > > > > diff --git a/docs/devel/tracing.rst b/docs/devel/tracing.rst > > index 4ebf8e38ea..8777c19d14 100644 > > --- a/docs/devel/tracing.rst > > +++ b/docs/devel/tracing.rst > > @@ -22,10 +22,15 @@ events:: > > This output comes from the "log" trace backend that is enabled by default > > when > > ``./configure --enable-trace-backends=BACKENDS`` was not explicitly > > specified. > > > > -More than one trace event pattern can be specified by providing a file > > -instead:: > > +Multiple patterns can be specified by repeating the ``--trace`` option:: > > + > > + $ qemu --trace "kvm_*" --trace "virtio_*" ... > > QEMU options are single dash with double dash accepted for compatibility but > help and other docs have single dash so these (and below) should be -trace. > (Also a bit less typing for otherwise already way too long command lines.)
Is this documented somewhere? I was under the impression that '-' is legacy syntax and '--' is the preferred syntax. There are examples of '--' on the QEMU man page. Let's reach agreement, document it, and then make the documentation consistent. Stefan
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