linux/include/rdma
Haggai Eran 882214e2b1 IB/core: Implement support for MMU notifiers regarding on demand paging regions
* Add an interval tree implementation for ODP umems. Create an
  interval tree for each ucontext (including a count of the number of
  ODP MRs in this context, semaphore, etc.), and register ODP umems in
  the interval tree.
* Add MMU notifiers handling functions, using the interval tree to
  notify only the relevant umems and underlying MRs.
* Register to receive MMU notifier events from the MM subsystem upon
  ODP MR registration (and unregister accordingly).
* Add a completion object to synchronize the destruction of ODP umems.
* Add mechanism to abort page faults when there's a concurrent invalidation.

The way we synchronize between concurrent invalidations and page
faults is by keeping a counter of currently running invalidations, and
a sequence number that is incremented whenever an invalidation is
caught. The page fault code checks the counter and also verifies that
the sequence number hasn't progressed before it updates the umem's
page tables. This is similar to what the kvm module does.

In order to prevent the case where we register a umem in the middle of
an ongoing notifier, we also keep a per ucontext counter of the total
number of active mmu notifiers. We only enable new umems when all the
running notifiers complete.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Yuval Dagan <yuvalda@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:36 -08:00
..
ib.h RDMA/cma: Define native IB address 2013-06-20 13:08:01 -07:00
ib_addr.h IB/cma: IBoE (RoCE) IP-based GID addressing 2014-01-18 14:12:35 -08:00
ib_cache.h IB/core: Add ib_find_exact_cached_pkey() 2012-09-30 20:33:30 -07:00
ib_cm.h IB/core: Don't resolve passive side RoCE L2 address in CMA REQ handler 2014-04-01 14:05:26 -07:00
ib_fmr_pool.h RDMA: Improve include file coding style 2008-07-14 23:48:44 -07:00
ib_mad.h IB/mad: Add user space RMPP support 2014-08-10 20:36:00 -07:00
ib_marshall.h RDMA/cma: Export rdma cm interface to userspace 2006-12-12 11:50:22 -08:00
ib_pack.h IB/core: Ethernet L2 attributes in verbs/cm structures 2014-01-14 14:20:54 -08:00
ib_pma.h IB/pma: Add include file for IBA performance counters definitions 2011-07-18 21:04:35 -07:00
ib_sa.h IB/core: Ethernet L2 attributes in verbs/cm structures 2014-01-14 14:20:54 -08:00
ib_smi.h IB: Remove __constant_{endian} uses 2009-01-17 17:11:57 -08:00
ib_umem.h IB/core: Add support for on demand paging regions 2014-12-15 18:13:36 -08:00
ib_umem_odp.h IB/core: Implement support for MMU notifiers regarding on demand paging regions 2014-12-15 18:13:36 -08:00
ib_verbs.h IB/core: Implement support for MMU notifiers regarding on demand paging regions 2014-12-15 18:13:36 -08:00
iw_cm.h RDMA/cma: Add IPv6 support for iWARP 2013-08-12 12:32:31 -07:00
iw_portmap.h RDMA/core: Add support for iWARP Port Mapper user space service 2014-06-10 10:11:45 -07:00
rdma_cm.h RDMA/cma: Export cma_get_service_id() 2013-06-20 23:35:41 -07:00
rdma_cm_ib.h RDMA: Fix license text 2008-07-14 23:48:43 -07:00
rdma_netlink.h RDMA/core: Add support for iWARP Port Mapper user space service 2014-06-10 10:11:45 -07:00