Re: [PATCH 00/12] perf lock: New subcommand "perf lock", foranalyzing lock statistics

From: Jason Baron
Date: Fri Jan 22 2010 - 11:43:55 EST

On Fri, Jan 22, 2010 at 10:39:01PM +0900, Hitoshi Mitake wrote:
> Adding new subcommand "perf lock" to perf.

looks like a really intresting patch! Does this patch mean that we can
potentially remove CONFIG_LOCK_STAT, now that the functionality is
available via 'perf'? Another desire for me has been to able to run
lockstat on production box. This has not been possible before without
incurring the performance penalty of lockdep. however, with 'perf' tools
ability to be turned on an off, perhaps there is (or we can build) a
mode for lockdep that is lower overhead for this usecase?


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