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Author Topic: kern.random.* tunable change  (Read 261 times)

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Offline left4pook

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kern.random.* tunable change
« on: October 30, 2017, 10:41:04 am »
Hi,

Just noticed that random (entropy) tunables have changed from FreeBSD 10 -> 11.  In System / Advanced / System Tunables, 2.4.1 and 2.4.2-dev are trying to turn off:

kern.random.sys.harvest.interrupt   
kern.random.sys.harvest.point_to_point   
kern.random.sys.harvest.ethernet   

These tunables no longer exist, however.  Instead, a mask is used:

kern.random.harvest.mask: 351

Which results in the same:

kern.random.harvest.mask_symbolic: [UMA],[FS_ATIME],SWI,[INTERRUPT],NET_NG,[NET_ETHER],NET_TUN,MOUSE,KEYBOARD,ATTACH,CACHED

Currently, 2.4.1 and 2.4.2-dev select all entropy sources, which would result in a performance hit.

Offline luckman212

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Re: kern.random.* tunable change
« Reply #1 on: October 30, 2017, 11:28:53 pm »