You are always so kind!
Now I have a question about reading a buffer of a application in user space.
Is it the only way to use the uDAPL?
I used to have an idea like this:
The application in user space gives the virtual start address and length of its data buffer to a kernel module program. This kernel program acts as a application of the kDAPL and registers the user space data buffer with the kDAPl, then request a RDMA read operation to complete the data transferring.
But I think it is not feasible after getting your last reply. Am I right?
Please give some suggestion and thanks very much!
On 12/6/05, James Lentini <[EMAIL PROTECTED]
> wrote:
Hi Ian,
An IB HCA needs to be able to DMA the memory used for RDMA read. Since
vmalloc does not guarantee that the memory it returns can be accessed
via DMA, you should not use vmalloc.
james
--
Ian Jiang
[EMAIL PROTECTED]
Laboratory of Spatial Information Technology
Division of System Architecture
Institute of Computing Technology
Chinese Academy of Sciences
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