On 2/22/07, Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:
On Wed, 2007-02-21 at 12:34 +0530, Aneesh Kumar wrote: > Hi, > > Is __copy_from_user_inatomic and __copy_to_user_inatomic really atomic if you call the _inatomic version you, the caller, are supposed to have pinned the memory first, to make sure it's not swapped out. If it is anyway, you'll get a error return code, no attempt is made to fault the page back in.
I am trying to locate the code for that. As far as i can see both the version __copy_to_user and __copy_to_user_inatomic doesn't have much difference. Also i looked at do_page_fault and i can see it finding vma. So where is it coded that it will not fault the page back in for _inatomic version ? -aneesh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
