Re: [RFC, PATCH] Avoid hot statistics cache line in ext4 extent cache

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On 3/26/2012 3:26 PM, Vivek Haldar wrote:
Andi --

I realized the problem soon after the original patch, and submitted
another patch to make these per cpu  counters.

Is there a clear use case having these counters on every production system?

Especially given that they are racy and prone to lost updates today.

And you can still get the information if you really need it by putting a systemtap etc. probe.

-Andi

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