Followup to: <20001126151120.V2272@parcelfarce.linux.theplanet.co.uk>
By author: Philipp Rumpf <prumpf@parcelfarce.linux.theplanet.co.uk>
In newsgroup: linux.dev.kernel
>
> I hope count isn't provided by userspace here ?
>
> > 1. What happens if the user space memory is swapped to disk? Will
> > verify_area() make sure that the memory is in physical RAM when it returns,
> > or will it return -EFAULT, or will something even worse happen?
>
> On i386, you'll sleep implicitly waiting for the page fault to be handled; in
> the generic case, anything could happen.
>
That doesn't sound right. I would expect it to wait for the page to
be brought in on any and all architectures, otherwise it seems rather
impossible to write portable Linux kernel code.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Nov 30 2000 - 21:00:17 EST