> Based on my browsing through the kernel code, it appears that the
> page->wait queue is not protected by any spinlocks. This means that
> multiple processes running on SMP can simultaneously call "wait_on_page".
> If the page is locked already, those processes would all be
> put into the wait queue. Without a spinlock to protect the page wait queue
> access, the queue can be messed up. Is this correct? Am I missing
> anything here?
Err, the spinlock that add_wait_queue() takes?
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