Re: [PATCH 11/16] IB uverbs: add mthca mmap support

2005-07-05 Thread Roland Dreier
Michael> Roland, I think VM_DONTCOPY is needed here. Michael> If a process forks, we must prevent the child from Michael> accessing the parent's hardware page. Otherwise the child Michael> can corrupt the parent's queues since the hardware wont Michael> be able to distinguish b

Re: [PATCH 11/16] IB uverbs: add mthca mmap support

2005-07-05 Thread Michael S. Tsirkin
Quoting r. Roland Dreier <[EMAIL PROTECTED]>: > Subject: Re: [PATCH 11/16] IB uverbs: add mthca mmap support > > Andrew> What's the thinking behind the VM_DONTCOPY there? > > As I said before, I don't think the thinking behind VM_DONTCOPY was > correct

Re: [PATCH 11/16] IB uverbs: add mthca mmap support

2005-07-05 Thread Roland Dreier
Andrew> What's the thinking behind the VM_DONTCOPY there? As I said before, I don't think the thinking behind VM_DONTCOPY was correct thinking. Let's take it out. I've now answered all your questions on this patchset (or at least written something in response to all your questions ;). What'