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As tipc reference table is statically allocated, its memory size requested on stack initialization stage is quite big even if the maximum port number is just restricted to 8191 currently, however, the number already becomes insufficient in practice. But if the maximum ports is allowed to its theory value - 2^32, its consumed memory size will reach a ridiculously unacceptable value. Apart from this, heavy tipc users spend a considerable amount of time in tipc_sk_get() due to the read-lock on ref_table_lock. If tipc reference table is converted with generic rhashtable, above mentioned both disadvantages would be resolved respectively: making use of the new resizable hash table can avoid locking on the lookup; smaller memory size is required at initial stage, for example, 256 hash bucket slots are requested at the beginning phase instead of allocating the entire 8191 slots in old mode. The hash table will grow if entries exceeds 75% of table size up to a total table size of 1M, and it will automatically shrink if usage falls below 30%, but the minimum table size is allowed down to 256. Also converts ref_table_lock to a separate mutex to protect hash table mutations on write side. Lastly defers the release of the socket reference using call_rcu() to allow using an RCU read-side protected call to rhashtable_lookup(). Signed-off-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jon.maloy@ericsson.com> Acked-by: Erik Hugne <erik.hugne@ericsson.com> Cc: Thomas Graf <tgraf@suug.ch> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
28 lines
916 B
Text
28 lines
916 B
Text
#
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# TIPC configuration
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#
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menuconfig TIPC
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tristate "The TIPC Protocol"
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depends on INET
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---help---
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The Transparent Inter Process Communication (TIPC) protocol is
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specially designed for intra cluster communication. This protocol
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originates from Ericsson where it has been used in carrier grade
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cluster applications for many years.
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For more information about TIPC, see http://tipc.sourceforge.net.
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This protocol support is also available as a module ( = code which
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can be inserted in and removed from the running kernel whenever you
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want). The module will be called tipc. If you want to compile it
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as a module, say M here and read <file:Documentation/kbuild/modules.txt>.
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If in doubt, say N.
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config TIPC_MEDIA_IB
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bool "InfiniBand media type support"
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depends on TIPC && INFINIBAND_IPOIB
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help
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Saying Y here will enable support for running TIPC on
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IP-over-InfiniBand devices.
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