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Author Topic: Change lro settings for vmxnet kernel module  (Read 7634 times)
alfito
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« on: Tuesday 15 November 2011, 11:51:06 pm »

Hello,

I'm running efw 2.4 as a vhost on Vmware ESXi 4.1. For the network adapters, I am using vmxnet3 drivers.
As discribed in several papers nwsmith.blogspot.com/2010/07/patching-vmxnet-to-disable-lro.html there is a performance problem with the lro parameter of the vmxnet module. Symtomps are specially noticeble on openvpn connections, with transfers throttled to 8 KB between when connecting to virtual machines. Other behaviours are described also.

Currently the endian kernel keeps lro enabled for vmxnet. I wonder if this module should be compiled with lro setting disabled as default.
As a workaround, module can be loaded with the option: disable_lro=1.
Which would be the best approach to load the driver with these option?
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