Re: [PATCH bpf] bpf: enforce BPF ringbuf size to be the power of 2
From: Yonghong Song <hidden>
Date: 2020-06-30 03:08:57
Also in:
bpf
On 6/29/20 3:17 PM, Andrii Nakryiko wrote:
BPF ringbuf assumes the size to be a multiple of page size and the power of
2 value. The latter is important to avoid division while calculating position
inside the ring buffer and using (N-1) mask instead. This patch fixes omission
to enforce power-of-2 size rule.
Fixes: 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it")
Signed-off-by: Andrii Nakryiko <redacted>Acked-by: Yonghong Song <redacted>