Re: [PATCH] rwsem: Comments to explain the meaning of the rwsem's count field

[Davidlohr Bueso]

On Thu, 2014-05-01 at 10:50 -0700, Tim Chen wrote:
> It takes me a while to understand how rwsem's count field mainifest
> itself in different scenarios.  I'm adding comments to provide a quick
> reference on the the rwsem's count field for each scenario where readers
> and writers are contending/holding the lock.  Hopefully it will be useful
> for future maintenance of the code and for people to get up to speed on
> how the logic in the code works.

Agreed, this is nice to have. I'm planning on sending a minor set of
patches for rwsem once the optistic spinning stuff is taken. To simplify
things, I can take this in the series and resend along with the others.

Thanks,
Davidlohr

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