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Re: [Xen-devel] swiotlb




On 13 Apr 2006, at 21:29, Ky Srinivasan wrote:

Given that the function __sync_single() can be called in an interrupt
context, why do we call a   potentially blocking function
(__copy_to_user) from within this function?

Good point. Would __copy_to_user_inatomic() be safe? It avoids might_sleep(). We know that the page fault itself (if any) will not block on I/O -- we only use __copy_to_user() to safely catch the fault and return.

 -- Keir


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