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Open Source and information security mailing list archives
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Date: Thu, 27 May 2010 21:18:21 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Dave Chinner <david@...morbit.com>, linux-kernel@...r.kernel.org, xfs@....sgi.com, linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org, tytso@....edu, jens.axboe@...cle.com Subject: Re: [PATCH 1/6] writeback: initial tracing support On Thu, 2010-05-27 at 14:32 -0700, Andrew Morton wrote: > > --- /dev/null > > +++ b/include/trace/events/writeback.h > > @@ -0,0 +1,171 @@ > > +#undef TRACE_SYSTEM > > +#define TRACE_SYSTEM writeback > > + > > +#if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ) > > Seems wrong. If you define TRACE_HEADER_MULTI_READ then include this > header twice, things explode. Which negates the purpose of > _TRACE_WRITEBACK_H. That's intended. It is documented in samples/trace_events/trace-events-samples.h The purpose of the TRACE_HEADER_MULTI_READ is to read the trace header multi times. ;-) You can also read about it here: http://lwn.net/Articles/379903/ here: http://lwn.net/Articles/381064/ and here: http://lwn.net/Articles/383362/ -- Steve > > > +#define _TRACE_WRITEBACK_H > > + > > +#include <linux/backing-dev.h> > > +#include <linux/writeback.h> > > + -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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