Hi Dan,

On Wed, Nov 26, 2008 at 02:50:18PM -0700, Dan Williams wrote:

I have done some work in this area too 

Got any preliminary patches you can share?

and have a lingering desire to hook MD up to the tracing
infrastructure du jour.  Have you considered using tracepoints [1]?
This would save the overhead of atomic operations when we're not
profiling.

Thanks for the suggestion, I'll look into that.

Cheers,
Jody

Regards,
Dan

[1]: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/tracepoints.txt;h=5d354e16749447c667934ecd4c8f4fe5ee3da36c;hb=HEAD