lwn.git/net/rds/ib.h, branch standardize-docs

net, rds: convert rds_ib_device.refcount from atomic_t to refcount_t

2017-07-04T21:35:17+00:00

refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova Signed-off-by: Hans Liljestrand Signed-off-by: Kees Cook Signed-off-by: David Windsor Signed-off-by: David S. Miller

Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

2017-02-25T21:45:43+00:00

Pull rdma DMA mapping updates from Doug Ledford: "Drop IB DMA mapping code and use core DMA code instead. Bart Van Assche noted that the ib DMA mapping code was significantly similar enough to the core DMA mapping code that with a few changes it was possible to remove the IB DMA mapping code entirely and switch the RDMA stack to use the core DMA mapping code. This resulted in a nice set of cleanups, but touched the entire tree and has been kept separate for that reason." * tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits) IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it IB/core: Remove ib_device.dma_device nvme-rdma: Switch from dma_device to dev.parent RDS: net: Switch from dma_device to dev.parent IB/srpt: Modify a debug statement IB/srp: Switch from dma_device to dev.parent IB/iser: Switch from dma_device to dev.parent IB/IPoIB: Switch from dma_device to dev.parent IB/rxe: Switch from dma_device to dev.parent IB/vmw_pvrdma: Switch from dma_device to dev.parent IB/usnic: Switch from dma_device to dev.parent IB/qib: Switch from dma_device to dev.parent IB/qedr: Switch from dma_device to dev.parent IB/ocrdma: Switch from dma_device to dev.parent IB/nes: Remove a superfluous assignment statement IB/mthca: Switch from dma_device to dev.parent IB/mlx5: Switch from dma_device to dev.parent IB/mlx4: Switch from dma_device to dev.parent IB/i40iw: Remove a superfluous assignment statement IB/hns: Switch from dma_device to dev.parent ...

RDS: net: Switch from dma_device to dev.parent

2017-01-24T17:26:17+00:00

Prepare for removal of ib_device.dma_device. Signed-off-by: Bart Van Assche Cc: Santosh Shilimkar Acked-by: Santosh Shilimkar Signed-off-by: Doug Ledford

IB/core: Change the type of an ib_dma_alloc_coherent() argument

2017-01-24T17:23:35+00:00

Change the type of the dma_handle argument from u64 * to dma_addr_t *. This patch does not change any functionality. Signed-off-by: Bart Van Assche Signed-off-by: Doug Ledford

RDS: IB: fix panic due to handlers running post teardown

2017-01-02T22:02:55+00:00

Shutdown code reaping loop takes care of emptying the CQ's before they being destroyed. And once tasklets are killed, the hanlders are not expected to run. But because of core tasklet code issues, tasklet handler could still run even after tasklet_kill, RDS IB shutdown code already reaps the CQs before freeing cq/qp resources so as such the handlers have nothing left to do post shutdown. On other hand any handler running after teardown and trying to access already freed qp/cq resources causes issues Patch fixes this race by makes sure that handlers returns without any action post teardown. Reviewed-by: Wengang Signed-off-by: Santosh Shilimkar

RDS: IB: Add vector spreading for cqs

2017-01-02T22:02:52+00:00

Based on available device vectors, allocate cqs accordingly to get better spread of completion vectors which helps performace great deal.. Signed-off-by: Santosh Shilimkar

RDS: IB: add few useful cache stasts

2017-01-02T22:02:51+00:00

Tracks the ib receive cache total, incoming and frag allocations. Signed-off-by: Santosh Shilimkar

RDS: IB: track and log active side endpoint in connection

2017-01-02T22:02:50+00:00

Useful to know the active and passive end points in a RDS IB connection. Signed-off-by: Santosh Shilimkar

RDS: IB: split the mr registration and invalidation path

2017-01-02T22:02:47+00:00

MR invalidation in RDS is done in background thread and not in data path like registration. So break the dependency between them which helps to remove the performance bottleneck. Signed-off-by: Santosh Shilimkar

RDS: IB: make the transport retry count smallest

2017-01-02T22:02:43+00:00

Transport retry is not much useful since it indicate packet loss in fabric so its better to failover fast rather than longer retry. Signed-off-by: Santosh Shilimkar