Re: [PATCH] tracing - fix function graph trace to properly display failed entries

[Frederic Weisbecker <fweisbec@gmail.com>]

On Fri, Dec 04, 2009 at 11:46:16AM +0100, Jiri Olsa wrote:
> > sure, but it is not the trace_seq structure that overflows, it is the bare 
> > seq_file underneath. The s_show calls "trace_print_seq":
> > 
> > void trace_print_seq(struct seq_file *m, struct trace_seq *s)
> > {               
> >         int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
> >         
> >         seq_write(m, s->buffer, len);
> > 
> >         trace_seq_init(s);
> > }               
> > 
> > it flushes the trace_seq to the seq_file and reinits the trace_seq.
> > But the seq_file will get filled in the end, ending up with
> > not displayed output in that case I described in the first email.
> > 
> 
> hi, any feedback on this?
> 
> thanks,
> jirka


Steven has done some tests and it looks like you were right, the
problem comes from the seq_file, not the trace_seq.

Steve, any news about it?

Thanks.