Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)

From: Johannes Berg
Date: Fri Oct 14 2016 - 06:00:36 EST

> So why is the performance hit acceptable for ESP but not for WPA? We
> could easily implement the same thing, i.e.,
> kmalloc(GFP_ATOMIC)/kfree the aead_req struct rather than allocate it
> on the stack

Yeah, maybe we should. It's likely a much bigger allocation, but I
don't actually know if that affects speed.

In most cases where you want high performance we never hit this anyway
since we'll have hardware crypto. I know for our (Intel's) devices we
normally never hit these code paths.

But on the other hand, you also did your changes for a reason, and the
only reason I can see of that is performance. So you'd be the one with
most "skin in the game", I guess?