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netfilter: ipvs: Add configurations of Maglev hashing

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To build the maglev hashing scheduler, add some configuration
to Kconfig and Makefile.

 - The compile configurations of MH are added to the Kconfig.

 - The MH build rule is added to the Makefile.

Signed-off-by: Inju Song <inju.song@navercorp.com>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Inju Song 2018-03-27 23:15:54 +09:00 committed by Simon Horman
parent 039f32e8cd
commit 30edf801d7
2 changed files with 38 additions and 0 deletions
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37
net/netfilter/ipvs/Kconfig
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@ -225,6 +225,25 @@ config IP_VS_SH
If you want to compile it in kernel, say Y. To compile it as a
module, choose M here. If unsure, say N.
config IP_VS_MH
tristate "maglev hashing scheduling"
---help---
The maglev consistent hashing scheduling algorithm provides the
Google's Maglev hashing algorithm as a IPVS scheduler. It assigns
network connections to the servers through looking up a statically
assigned special hash table called the lookup table. Maglev hashing
is to assign a preference list of all the lookup table positions
to each destination.
Through this operation, The maglev hashing gives an almost equal
share of the lookup table to each of the destinations and provides
minimal disruption by using the lookup table. When the set of
destinations changes, a connection will likely be sent to the same
destination as it was before.
If you want to compile it in kernel, say Y. To compile it as a
module, choose M here. If unsure, say N.
config IP_VS_SED
tristate "shortest expected delay scheduling"
---help---
@ -266,6 +285,24 @@ config IP_VS_SH_TAB_BITS
needs to be large enough to effectively fit all the destinations
multiplied by their respective weights.
comment 'IPVS MH scheduler'
config IP_VS_MH_TAB_INDEX
int "IPVS maglev hashing table index of size (the prime numbers)"
range 8 17
default 12
---help---
The maglev hashing scheduler maps source IPs to destinations
stored in a hash table. This table is assigned by a preference
list of the positions to each destination until all slots in
the table are filled. The index determines the prime for size of
the table as 251, 509, 1021, 2039, 4093, 8191, 16381, 32749,
65521 or 131071. When using weights to allow destinations to
receive more connections, the table is assigned an amount
proportional to the weights specified. The table needs to be large
enough to effectively fit all the destinations multiplied by their
respective weights.
comment 'IPVS application helper'
config IP_VS_FTP

1
net/netfilter/ipvs/Makefile
View File

@ -33,6 +33,7 @@ obj-$(CONFIG_IP_VS_LBLC) += ip_vs_lblc.o
obj-$(CONFIG_IP_VS_LBLCR) += ip_vs_lblcr.o
obj-$(CONFIG_IP_VS_DH) += ip_vs_dh.o
obj-$(CONFIG_IP_VS_SH) += ip_vs_sh.o
obj-$(CONFIG_IP_VS_MH) += ip_vs_mh.o
obj-$(CONFIG_IP_VS_SED) += ip_vs_sed.o
obj-$(CONFIG_IP_VS_NQ) += ip_vs_nq.o