Messages in this thread | | | Date | Mon, 18 Apr 2005 15:19:33 -0500 | From | Timur Tabi <> | Subject | Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation |
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Arjan van de Ven wrote:
> you just said that you didn't care that it got munlock'd. So you don't > care that it gets freed either. And then reused.
Well, I can live with the app being able to call munlock(), because the apps that our customers use don't call munlock(). What I can't live with is a bug in the kernel that causes pinned pages to be swapped or moved.
Obviously, I would rather call get_user_pages() instead of mlock(), but I can't, because get_user_pages doesn't work. The page doesn't stay pinned at the physical address, but it does if I call mlock() and get_user_pages().
Actually, in our tests, calling mlock() appears to be good enough, but I'll update our code to call get_user_pages() as well.
-- Timur Tabi Staff Software Engineer timur.tabi@ammasso.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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