Re: [PATCH bpf-next v4 0/3] bpf, arm64: use BPF prog pack allocator in BPF JIT

[Mark Rutland]

On Mon, Jul 03, 2023 at 06:40:21PM +0200, Daniel Borkmann wrote:
> Hi Mark,

Hi Daniel,

> On 6/26/23 10:58 AM, Puranjay Mohan wrote:
> > BPF programs currently consume a page each on ARM64. For systems with many BPF
> > programs, this adds significant pressure to instruction TLB. High iTLB pressure
> > usually causes slow down for the whole system.
> > 
> > Song Liu introduced the BPF prog pack allocator[1] to mitigate the above issue.
> > It packs multiple BPF programs into a single huge page. It is currently only
> > enabled for the x86_64 BPF JIT.
> > 
> > This patch series enables the BPF prog pack allocator for the ARM64 BPF JIT.

> If you get a chance to take another look at the v4 changes from Puranjay and
> in case they look good to you reply with an Ack, that would be great.

Sure -- this is on my queue of things to look at; it might just take me a few
days to get the time to give this a proper look.

Thanks,
Mark.