On Fri, 27 Sep 2002, Ingo Molnar wrote:
>
> the problem is that we want to catch all COW events of the virtual
> address, *and* we want to have a correct (physpage,offset) futex hash.
So?
spin_lock(&futex_lock);
> q.page = NULL;
> attach_vcache(&q.vcache, uaddr, current->mm, futex_vcache_callback);
>
> page = pin_page(uaddr - offset);
> ret = IS_ERR(page);
> if (ret)
> goto out;
> head = hash_futex(page, offset);
> set_current_state(TASK_INTERRUPTIBLE);
> init_waitqueue_head(&q.waiters);
> add_wait_queue(&q.waiters, &wait);
> queue_me(head, &q, page, offset, -1, NULL, uaddr);
spin_unlock(&futex_lock);
And get the futex_lock in the callback.
Linus
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This archive was generated by hypermail 2b29 : Mon Sep 30 2002 - 22:00:32 EST