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's your
feeling on merging? If more info is required, just let me know. I'll
also be at the kernel summit in a couple of weeks if you want to go
over it in person.
- R.
There's no need to set VM_DONTCOPY when mmap()ing the hardware
doorbell page into userspace.
Signed-off-by: Roland Dreier <[email protected]>
--- linux-export.orig/drivers/infiniband/hw/mthca/mthca_provider.c 2005-06-28 15:20:28.000000000 -0700
+++ linux-export/drivers/infiniband/hw/mthca/mthca_provider.c 2005-07-05 12:14:20.838664330 -0700
@@ -347,7 +347,6 @@
return -EINVAL;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_flags |= VM_DONTCOPY;
if (remap_pfn_range(vma, vma->vm_start,
to_mucontext(context)->uar.pfn,
-
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