On 07/19/2015 02:25 PM, Vasiliy Tolstov wrote:
> On 7/16/2015 6:25 PM, Bart Van Assche wrote:
>> it is easy to add to the SRP initiator and target drivers.
>> Implementations exist in the ib_srp-backport initiator driver and the
>> SCST SRP target driver (see also
>> https://github.com/bvanassche/ib_srp-backport and
>> http://sourceforge.net/p/scst/svn/HEAD/tree/trunk/srpt/). These
>> implementations are available since considerable time, work reliably,
>> are backwards compatible and support zero-copy. Since using immediate
>> data provides a measurable performance improvement I'm wondering whether
>> it would be acceptable to add support for immediate data to the SRP
>> drivers in the Linux kernel tree (ib_srp and ib_srpt) ?
Does this possible in userspace? I'm working on software defined storage
with rdma support,and I think this is usable.
Hello Vasiliy,
The feature of the RDMA API that was used to implement sending inline
data, namely passing a scatterlist to ib_post_send() with more than one
element, is also available in the user space RDMA API. I think it would
be easy to add inline data support in a user space implementation of
SRP. Not that it really matters, but your e-mail made me wonder whether
the source code of the user space SRP initiator implementation you are
working is available somewhere, and if so, under which license ?
Bart.
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