Re: [PATCH 2/2] arm64: bpf: add BPF XADD instruction
From: Peter Zijlstra
Date: Wed Nov 11 2015 - 17:21:59 EST
On Wed, Nov 11, 2015 at 11:55:59AM -0800, Alexei Starovoitov wrote:
> Therefore things like memory barriers, full set of atomics are not applicable
> in bpf world.
There are still plenty of wait-free constructs one can make using them.
Say a barrier/rendezvous construct for knowing when an event has
happened on all CPUs.
But if you really do not want any of that, I suppose that is a valid
Is even privileged (e)BPF not allowed things like this? I was thinking
the strict no loops stuff was for unpriv (e)BPF only.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/