Fujitsu compilers used with the GNU compatibility option (-Xg)
do not yet support all the gnu flags (e.g. -pedantic) and that can
cause the linker (and hence configure) crash.
Fujitsu compilers are identified by the __FUJITSU macro.
When a libibverbs driver returns NULL for its context, it's the Open
MPI libibverbs fake driver. Hence, this device is simply not
supported -- ignore it.
libibverbs will complain to stderr if it sees device entries in
/sys/class/infiniband for which it has no userspace plugins.
The Cisco usNIC device no longer exports a verbs interface, thereby
causing libibverbs to emit this annoying stderr warning.
To avoid this, use the public ibv API to register a "fake" libibverbs
driver at run-time (right after we call ibv_fork_init(), but --
critically -- *before* we call ibv_get_device_list()). The purpose of
this driver is solely to convince libibverbs that there *is* a driver
for /sys/class/infininband/usnic_verbs devices. ...although this
driver will never return a valid ibv context (and therefore will never
be used).
Defer initializing the CPCs until we know that we have devices/ports
to use. This both prevents some useless work at startup when there
are no devices/ports to use, and also prevents librdmacm complaining
that there are no verbs-capable RDMA devices available (e.g., if a
Cisco usNIC device is present, but does not present a verbs RDMA
interface).
Defer initializing the CPCs until we know that we have devices/ports
to use. This both prevents some useless work at startup when there
are no devices/ports to use, and also prevents librdmacm complaining
that there are no verbs-capable RDMA devices available (e.g., if a
Cisco usNIC device is present, but does not present a verbs RDMA
interface).
The length parameter of ompi_mtl_portals4_long_isend() was declared
as "int", which may not be big enough depending on the platform and
compiler options used. This commit changes the type to size_t to
prevent overflow.
The source field was 16 bits which is not sufficient for many
current and future machines. This commit expands the source field
to 24 bits and reduces the tag field from 32 bits to 24 bits.
After a simple search-replace, the Portals4 description actually
described Portals3. This commit replaces the Portals3 description
with a Portals4 description.
Thanks to Paul Hargrove for spotting this and supplying the patch.
Move the call to opal_common_verbs_fork_test() to up before the call
to ibv_get_device_list() (just curious -- why not use
opal_ibv_get_device_list()?). This ensures that the call to
ibv_fork_init() is before *all* other ibv_* calls.
