Caitlin> Every RDMA related interface specification that I know of
Caitlin> specifically excludes support of RDMA resources being
Caitlin> inherited by child processes, with the warning that
Caitlin> excellent implementations will give the child process an
Caitlin> error for attempting to use the parent's RDMA resources.
Caitlin> More streamlined implementations will simply be
Caitlin> unpredictable.
Caitlin> As for forking while the parent has a pending read: since
Caitlin> the parent has not reaped the completion at the time of
Caitlin> the fork the buffers in question are undefined. The
Caitlin> child's buffers will be consistent, that is they are
Caitlin> undefined.
I think you've missed the point: unless a process sets VM_DONTCOPY on
its RDMA memory regions, then incorrect memory mappings may be used if
the app does something as simple as calling system("ls").
- R.
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