Re: [PATCH] ext4: use percpu counter for extent cache count

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On Sat, Mar 02, 2013 at 10:26:44AM -0500, Theodore Ts'o wrote:
> On Fri, Mar 01, 2013 at 12:02:34PM -0600, Eric Sandeen wrote:
> > 
> > I was mostly keying off what quota felt was best, I guess.
> > I'm not wedded to either approach, it was just a thought.
> > So you can take it or leave it. :)
> 
> I'll take it, but for the record, there's a reason why I label patches
> with "I haven't tested this yet" disclaimers.
> 
> For future reference, calling percpu_counter_init() and
> percpu_counter_destroy() is not optional --- without them, in your
> original patch, the kernel will crash them the first time an ext4 file
> system mount is attempted.
> 
> No worries though, no harm done --- but it's better if people don't
> rely on me to catch bugs before they go into the tree.  :-)

Really sorry for the delay reply.

Dave, thank you very much for your test and reporting this regression.

Ted, Eric, thank you very much for fixing it.  

I really think I need to be responsible for reviewing and testing this
patch because I screw it up.  My apology.

Thanks,
                                                - Zheng
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