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| author |   Yishai Hadas <yishaih@nvidia.com> | 2020-09-30 19:38:25 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2020-10-01 16:39:54 -0300 |
| commit | 36f30e486dce22345c2dd3a3ba439c12cd67f6ba (patch) | |
| tree | ced2407f4fa17dbd933eb1f1b5c128531a09cda2 /drivers/infiniband/Kconfig | |
| parent | RDMA/addr: Fix race with netevent_callback()/rdma_addr_cancel() (diff) | |
| download | linux-dev-36f30e486dce22345c2dd3a3ba439c12cd67f6ba.tar.xz linux-dev-36f30e486dce22345c2dd3a3ba439c12cd67f6ba.zip | |
IB/core: Improve ODP to use hmm_range_fault()
Move to use hmm_range_fault() instead of get_user_pags_remote() to improve
performance in a few aspects:
This includes:
- Dropping the need to allocate and free memory to hold its output
- No need any more to use put_page() to unpin the pages
- The logic to detect contiguous pages is done based on the returned
order, no need to run per page and evaluate.
In addition, moving to use hmm_range_fault() enables to reduce page faults
in the system with it's snapshot mode, this will be introduced in next
patches from this series.
As part of this, cleanup some flows and use the required data structures
to work with hmm_range_fault().
Link: https://lore.kernel.org/r/20200930163828.1336747-2-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/Kconfig')
| -rw-r--r-- | drivers/infiniband/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig index 91b023341b77..32a51432ec4f 100644 --- a/drivers/infiniband/Kconfig +++ b/drivers/infiniband/Kconfig @@ -48,6 +48,7 @@ config INFINIBAND_ON_DEMAND_PAGING depends on INFINIBAND_USER_MEM select MMU_NOTIFIER select INTERVAL_TREE + select HMM_MIRROR default y help On demand paging support for the InfiniBand subsystem. |