IB/qib: RDMA lkey/rkey validation is inefficient for large MRs

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The current code loops during rkey/lkey validiation to isolate the MR
for the RDMA, which is expensive when the current operation is inside
a very large memory region.

This fix optimizes rkey/lkey validation routines for user memory
regions and fast memory regions.  The MR entry can be isolated by
shifts/mods instead of looping.  The existing loop is preserved for
phys memory regions for now.

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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Mike Marciniszyn 2011-01-10 17:42:22 -08:00 • committed by Roland Dreier

parent 7c3edd3ff3

commit 2a600f14d2

3 changed files with 60 additions and 23 deletions

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74

drivers/infiniband/hw/qib/qib_keys.c

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8

drivers/infiniband/hw/qib/qib_mr.c

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1

drivers/infiniband/hw/qib/qib_verbs.h

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