Messages in this thread | | | Date | Tue, 23 Aug 2016 21:00:07 -0700 | From | Davidlohr Bueso <> | Subject | Re: [RFC PATCH-tip v4 10/10] locking/rwsem: Add a boot parameter to reader spinning threshold |
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On Thu, 18 Aug 2016, Waiman Long wrote:
>The default reader spining threshold is current set to 4096. However, >the right reader spinning threshold may vary from one system to >another and among the different architectures. This patch adds a new >kernel boot parameter to modify the threshold value. This enables >better tailoring to the needs of different systems as well as for >testing purposes.
It also means that those systems could very easily be incorrectly tailored. (and worse case scenario: reboot, is obviously a terrible way to get rid of any issues). I very much disagree with exposing this sort of core stuff, it should work well for everyone out of the box, not relying on users to properly configure this.
Thanks, Davidlohr
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