Re: Lockmeter Analysis of 2 DDs

lahr (lahr@us.ibm.com)
Fri, 7 Sep 2001 10:04:56 -0700


> Indeed, io_request_lock is very hot once the bounce buffers were
> eliminated. Is anyone working on a patch for the io_request_lock that
> possibly take the global lock and splits it into a per device queue lock?
> We understand that getting this patch into 2.4 is unlikely, but it would
> be nice to have this patch available on 2.4 for experimental purposes.

I recently published a patch for 2.4 that addresses this exact issue at
http://lse.sourceforge.net/io/

Jonathan

-- 
Jonathan Lahr
IBM Linux Technology Center
Beaverton, Oregon
lahr@us.ibm.com
503-578-3385

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