IB/srp: allow lockless work posting

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Only one CPU at a time will own an RX IU, so using the address of the IU
as the work request cookie allows us to avoid taking a lock. We can
similarly prepare the TX path for lockless posting by moving the free TX
IUs to a list. This also removes the requirement that the queue sizes be
a power of 2.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
[ broken out, small cleanups, and modified to avoid needing an extra field
  in the IU by David Dillow]
Signed-off-by: David Dillow <dillowda@ornl.gov>

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Bart Van Assche 2010-11-26 13:22:48 -05:00 • committed by David Dillow

parent 9709f0e05b

commit dcb4cb85f4

2 changed files with 28 additions and 44 deletions

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65

drivers/infiniband/ulp/srp/ib_srp.c

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7

drivers/infiniband/ulp/srp/ib_srp.h

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