[Gluster-devel] zero-copy readv

Amar Tumballi atumball at redhat.com
Thu Jan 10 08:30:27 UTC 2013

>> [1] - recent patches to handle RPC read-ahead may involve small data
>> copy from header to data buffer, but surely not very high.
> Amar - note that the current infrastructure present for 0-copy RDMA
> might not be sufficient for GFAPI's 0-copy. A glfs_readv() request from
> the app can come as a vector of memory pointers (and not a contiguous
> iobuf) and therefore require storing an iovec/count as well. This might
> also mean we need to exercise the scatter-gather aspects of the verbs API.

Got it.. Thats right.


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