From: Eduard Zingerman <eddyz87@gmail.com>
To: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Benjamin Tissoires <bentiss@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
Jiri Olsa <jolsa@kernel.org>, Mykola Lysenko <mykolal@fb.com>,
Shuah Khan <shuah@kernel.org>,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH RFC bpf-next v6 1/6] bpf/helpers: introduce sleepable bpf_timers
Date: Tue, 09 Apr 2024 00:17:38 +0300 [thread overview]
Message-ID: <371c84608bd10736de6b1a8abee3fd1d43664a9a.camel@gmail.com> (raw)
In-Reply-To: <CAO-hwJ+0erX3iJcOh9KBG3f01UiYvGk_Gx+-zyFc4Vb5LCcHxA@mail.gmail.com>
On Mon, 2024-04-08 at 19:20 +0200, Benjamin Tissoires wrote:
[...]
> That was my initial assumption too, but Alexei told me it was fine.
> And I think he is correct because kfree_rcu doesn't need the rcu_head
> to be initialized.
>
> So in the end, we initialize the memory as a work_struct, and when
> that work kicks in, we reuse that exact same memory as the rcu_head.
> This is fine because that work will never be reused.
Oh, I get it, thank you for explanation.
Thanks,
Eduard
next prev parent reply other threads:[~2024-04-08 21:17 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-08 8:09 [PATCH RFC bpf-next v6 0/6] sleepable bpf_timer (was: allow HID-BPF to do device IOs) Benjamin Tissoires
2024-04-08 8:09 ` [PATCH RFC bpf-next v6 1/6] bpf/helpers: introduce sleepable bpf_timers Benjamin Tissoires
2024-04-08 17:07 ` Eduard Zingerman
2024-04-08 17:20 ` Benjamin Tissoires
2024-04-08 21:17 ` Eduard Zingerman [this message]
2024-04-09 3:04 ` Alexei Starovoitov
2024-04-08 8:09 ` [PATCH RFC bpf-next v6 2/6] bpf: Add support for KF_ARG_PTR_TO_TIMER bentiss
2024-04-08 21:55 ` Eduard Zingerman
2024-04-12 8:14 ` Benjamin Tissoires
2024-04-08 8:09 ` [PATCH RFC bpf-next v6 3/6] bpf/helpers: introduce bpf_timer_set_sleepable_cb() kfunc Benjamin Tissoires
2024-04-08 14:25 ` Eduard Zingerman
2024-04-08 17:16 ` Benjamin Tissoires
2024-04-08 8:09 ` [PATCH RFC bpf-next v6 4/6] bpf/helpers: mark the callback of bpf_timer_set_sleepable_cb() as sleepable Benjamin Tissoires
2024-04-08 22:35 ` Eduard Zingerman
2024-04-09 3:14 ` Alexei Starovoitov
2024-04-08 8:09 ` [PATCH RFC bpf-next v6 5/6] tools: sync include/uapi/linux/bpf.h Benjamin Tissoires
2024-04-09 3:15 ` Alexei Starovoitov
2024-04-08 8:09 ` [PATCH RFC bpf-next v6 6/6] selftests/bpf: add sleepable timer tests Benjamin Tissoires
2024-04-08 23:00 ` Eduard Zingerman
2024-04-09 3:16 ` Alexei Starovoitov
2024-04-09 3:17 ` [PATCH RFC bpf-next v6 0/6] sleepable bpf_timer (was: allow HID-BPF to do device IOs) Alexei Starovoitov
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