Floating point in the kernel

Sean MacLennan smaclennan at pikatech.com
Fri Dec 11 11:17:19 EST 2009

Found it. We are calling sock_sendmsg, which is definitely a call that
can block! The receive side is done in a thread (which does no floating
point ;), but the send was called directly from the "evil FP thread".

It looks like under light load, you tend to get away with it, so our
trivial testing did not catch it. And most of our warp users do RTP via
asterisk, so this RTP path was not really tested.

I really appreciate the input, the comments convinced me I was going
in the wrong direction and forced me to look harder. I am going to back
out the two patches I sent and fix this properly instead.


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