Re: Unreliable Guide to Locking - Addition?

[Rusty Russell]

On Mon, 2005-08-08 at 18:41 +0530, Kedar Sovani wrote:
>     when the last atomic_dec_and_test() (the last == the one which
> returns 0) is being called on the object, the object is usually not
> accessible to others (list_del()) and hence the  simultaneous
> atomic_inc() call never occurs.

Yes, a reference count must count references.  Of course, you can get
around with with "atomic_dec_and_lock", but I hate that primitive as it
has scalability issues (it can't be translated to RCU).

I'll look and see if I can make this requirement explicit.

Thanks!
Rusty.
-- 
A bad analogy is like a leaky screwdriver -- Richard Braakman

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