From: Jakub Sitnicki <jakub@cloudflare.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Lorenz Bauer <lmb@cloudflare.com>,
Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
kernel-team@cloudflare.com, netdev@vger.kernel.org,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH bpf-next 4/4] bpf: export bpf_jit_current
Date: Mon, 27 Sep 2021 16:01:18 +0200 [thread overview]
Message-ID: <871r5aglsh.fsf@cloudflare.com> (raw)
In-Reply-To: <a076398b-f1da-c939-3c71-ac157ad96939@iogearbox.net>
On Mon, Sep 27, 2021 at 03:34 PM CEST, Daniel Borkmann wrote:
> On 9/24/21 11:55 AM, Lorenz Bauer wrote:
>> Expose bpf_jit_current as a read only value via sysctl.
>> Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
>> ---
I find exposing stats via system configuration variables a bit
unexpected. Not sure if there is any example today that we're following.
Maybe an entry under /sys/kernel/debug would be a better fit?
That way we don't have to commit to a sysctl that might go away if we
start charging JIT allocs against memory cgroup quota.
Although that brings up question against which cgroup iptables xt_bpf
allocations should be charged? Root cgroup?
next prev parent reply other threads:[~2021-09-27 14:02 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 9:55 [PATCH bpf-next 0/4] Fix up bpf_jit_limit some more Lorenz Bauer
2021-09-24 9:55 ` Lorenz Bauer
2021-09-24 9:55 ` [PATCH bpf-next 1/4] bpf: define bpf_jit_alloc_exec_limit for riscv JIT Lorenz Bauer
2021-09-24 9:55 ` Lorenz Bauer
2021-09-24 15:28 ` Luke Nelson
2021-09-24 15:28 ` Luke Nelson
2021-09-24 9:55 ` [PATCH bpf-next 2/4] bpf: define bpf_jit_alloc_exec_limit for arm64 JIT Lorenz Bauer
2021-09-24 9:55 ` Lorenz Bauer
2021-09-29 16:18 ` Will Deacon
2021-09-29 16:18 ` Will Deacon
2021-09-24 9:55 ` [PATCH bpf-next 3/4] bpf: prevent increasing bpf_jit_limit above max Lorenz Bauer
2021-09-24 9:55 ` [PATCH bpf-next 4/4] bpf: export bpf_jit_current Lorenz Bauer
2021-09-27 13:34 ` Daniel Borkmann
2021-09-27 14:01 ` Jakub Sitnicki [this message]
2021-09-28 9:02 ` Lorenz Bauer
2021-09-29 14:56 ` Nicolas Dichtel
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