Van> Yes, but that isn't the point: unless you eliminate all rw
Van> locks, it is conceptually possible to cause a kernel deadlock
Van> by forcing contention on the locks you didn't remove, if the
Van> user can force the kernel to acquire a reader lock and if
Van> something else needs to acquire the writer lock. Correctness
Van> is the issue, not performance.
I agree with Kevin here. There must be some argument as to why
readers cannot indefinitely lock out a writer. A probabilistic
argument is fine, but just saying "contention doesn't happen"
certainly isn't good enough.
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