This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1923104
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1923104
Title:
Include Infiniband Peer Memory interface
Status in linux package in Ubuntu:
Incomplete
Bug description:
The peer_memory_client scheme allows a driver to register with the ib_umem
system that it has the ability to understand user virtual address ranges that
are not compatible with get_user_pages(). For instance VMAs created with
io_remap_pfn_range(), or other driver special VMA.
For ranges the interface understands it can provide a DMA mapped sg_table for
use by the ib_umem, allowing user virtual ranges that cannot be supported by
get_user_pages() to be used as umems for RDMA.
This is designed to preserve the kABI, no functions or structures are
changed, only new symbols are added:
ib_register_peer_memory_client
ib_unregister_peer_memory_client
ib_umem_activate_invalidation_notifier
ib_umem_get_peer
And a bitfield in struct ib_umem uses more bits.
This interface is compatible with the two out of tree GPU drivers:
https://github.com/RadeonOpenCompute/ROCK-Kernel-Driver/blob/master/drivers/gpu/drm/amd/amdkfd/kfd_peerdirect.c
https://github.com/Mellanox/nv_peer_memory/blob/master/nv_peer_mem.c
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