IB/isert: add module param to set sg_tablesize for IO cmd

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[ Upstream commit dae7a75f1f ]

Currently, iser target support max IO size of 16MiB by default. For some
adapters, allocating this amount of resources might reduce the total
number of possible connections that can be created. For those adapters,
it's preferred to reduce the max IO size to be able to create more
connections. Since there is no handshake procedure for max IO size in iser
protocol, set the default max IO size to 1MiB and add a module parameter
for enabling the option to control it for suitable adapters.

Fixes: 317000b926 ("IB/isert: allocate RW ctxs according to max IO size")
Link: https://lore.kernel.org/r/20201019094628.17202-1-mgurtovoy@nvidia.com
Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Max Gurtovoy 2020-10-19 12:46:28 +03:00 • committed by Greg Kroah-Hartman

parent 5840f8687f

commit c313e91b97

2 changed files with 32 additions and 1 deletions

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27

drivers/infiniband/ulp/isert/ib_isert.c

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6

drivers/infiniband/ulp/isert/ib_isert.h

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