RDMA/umem: Don't hold mmap_sem for too long

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DMA mapping is time consuming operation and doesn't need to be performed
with mmap_sem semaphore is held.

The semaphore only needs to be held for accounting and get_user_pages
related activities.

Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Leon Romanovsky 2018-07-10 13:31:48 +03:00 • committed by Jason Gunthorpe

parent 6869e0004f

commit 40ddacf2dd

1 changed files with 14 additions and 10 deletions

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24

drivers/infiniband/core/umem.c

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