On 7/29/10 1:22 PM, Ralph Campbell wrote:
On Thu, 2010-07-29 at 09:25 -0700, Tom Tucker wrote:
From: Tom Tuckert...@opengridcomputing.com
Add an ib_iomem_get service that converts a vma to an array of
physical addresses. This makes it easier for each device driver to
add support for the
I forgot to ask how pages are marked as being locked.
I see that the user process amount of locked memory is
adjusted but the actual pages themselves aren't converted
to struct page and the refcount incremented.
Presumably, the device which created the
vma-vm_flags VM_PFNMAP mapping owns the
On Thu, Jul 29, 2010 at 03:29:37PM -0500, Tom Tucker wrote:
Also, I'd like to see a strong defence of this new user space API
particularly:
1) Why can't this be done with the existing ibv_reg_mr, like huge
pages are.
The ibv_reg_mr API assumes that the memory being registered was
On 7/29/10 3:41 PM, Jason Gunthorpe wrote:
On Thu, Jul 29, 2010 at 03:29:37PM -0500, Tom Tucker wrote:
Also, I'd like to see a strong defence of this new user space API
particularly:
1) Why can't this be done with the existing ibv_reg_mr, like huge
pages are.
The
On 7/29/10 11:25 AM, Tom Tucker wrote:
From: Tom Tuckert...@opengridcomputing.com
Add an ib_iomem_get service that converts a vma to an array of
physical addresses. This makes it easier for each device driver to
add support for the reg_io_mr provider method.
Signed-off-by: Tom
On Thu, 2010-07-29 at 13:41 -0700, Jason Gunthorpe wrote:
On Thu, Jul 29, 2010 at 03:29:37PM -0500, Tom Tucker wrote:
Also, I'd like to see a strong defence of this new user space API
particularly:
1) Why can't this be done with the existing ibv_reg_mr, like huge
pages are.
You would need to modify ib_umem_get() to check for the VM_PFNMAP
flag and build the struct ib_umem similar to the proposed
ib_iomem_get(). However, the page reference counting/sharing issue
would need to be solved. I think there are kernel level callbacks
for this that could be used.
But in
On Thu, 2010-07-29 at 15:57 -0700, Jason Gunthorpe wrote:
You would need to modify ib_umem_get() to check for the VM_PFNMAP
flag and build the struct ib_umem similar to the proposed
ib_iomem_get(). However, the page reference counting/sharing issue
would need to be solved. I think there
On 7/29/10 5:57 PM, Jason Gunthorpe wrote:
You would need to modify ib_umem_get() to check for the VM_PFNMAP
flag and build the struct ib_umem similar to the proposed
ib_iomem_get(). However, the page reference counting/sharing issue
would need to be solved. I think there are kernel level
