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__get_user_pages_fast
2019 Aug 13
1
[PATCH V5 0/9] Fixes for vhost metadata acceleration
On Tue, Aug 13, 2019 at 04:31:07PM +0800, Jason Wang wrote:
> What kind of issues do you see? Spinlock is to synchronize GUP with MMU
> notifier in this series.
A GUP that can't sleep can't pagefault which makes it a really weird
pattern
> Btw, back to the original question. May I know why synchronize_rcu() is not
> suitable? Consider:
We already went over this. You'd