From: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>
To: "Andrii Nakryiko" <andrii.nakryiko@gmail.com>
Cc: "Andrea Righi" <arighi@nvidia.com>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Eduard Zingerman" <eddyz87@gmail.com>,
"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
"Martin KaFai Lau" <martin.lau@linux.dev>,
"Song Liu" <song@kernel.org>,
"Yonghong Song" <yonghong.song@linux.dev>,
"Jiri Olsa" <jolsa@kernel.org>,
"Emil Tsalapatis" <emil@etsalapatis.com>,
"Ihor Solodrai" <ihor.solodrai@linux.dev>,
"John Fastabend" <john.fastabend@gmail.com>,
"Josh Don" <joshdon@google.com>,
"Vineeth Pillai" <vineethrp@google.com>,
"Balbir Singh" <balbirs@nvidia.com>,
"Shameer Kolothum" <skolothumtho@nvidia.com>,
"Himadri Chhaya-Shailesh" <himadrics@protonmail.com>,
"NchangRoy" <royfru44@gmail.com>, <bpf@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH bpf-next 0/5] bpf: Expose pinned arenas as sized bpffs files
Date: Mon, 19 Oct 2026 16:58:45 +0000 [thread overview]
Message-ID: <DM8Z3GGUEUFH.2WBEEIG5RKMRL@gmail.com> (raw)
In-Reply-To: <CAEf4BzaeXxoPqtcV6E1x8zh-Uv_C1cfNjzUYLKDWwod=k2ttLQ@mail.gmail.com>
On Mon Oct 19, 2026 at 4:19 PM UTC, Andrii Nakryiko wrote:
>
> Yeah, there are just so many cases where we have some memory that is
> special in some way (e.g., huge page-backed memory, or some IOMMU,
> e.g., that doorbell stuff, which, if I understand correctly, is done
> though writes to specially set up memory ranges), and we can't shove
> all this into BPF_MAP_CREATE interface if we want to have BPF program
> accessing that memory. So having a generic way to just bolt ARRAY on
> top of already created memory seems like a useful primitive.
I see. In such light the use case makes sense to me.
next prev parent reply other threads:[~2026-10-19 16:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-10 22:45 [PATCH bpf-next 0/5] bpf: Expose pinned arenas as sized bpffs files Andrea Righi
2026-10-10 22:45 ` [PATCH 1/5] bpf: Add an arena flag to retain allocated pages Andrea Righi
2026-10-10 23:00 ` sashiko-bot
2026-10-10 22:45 ` [PATCH 2/5] bpf: Expose pinned arenas as sized bpffs files Andrea Righi
2026-10-10 23:06 ` sashiko-bot
2026-10-10 23:40 ` bot+bpf-ci
2026-10-10 22:45 ` [PATCH 3/5] docs/bpf: Document pinned arena file mappings Andrea Righi
2026-10-10 23:19 ` bot+bpf-ci
2026-10-10 22:45 ` [PATCH 4/5] selftests/bpf: Test " Andrea Righi
2026-10-10 23:40 ` bot+bpf-ci
2026-10-10 22:46 ` [PATCH 5/5] selftests/bpf: Test two-way arena access with two guests Andrea Righi
2026-10-10 23:00 ` sashiko-bot
2026-10-10 23:40 ` bot+bpf-ci
2026-10-15 17:50 ` [PATCH bpf-next 0/5] bpf: Expose pinned arenas as sized bpffs files Josh Don
2026-10-19 8:17 ` Andrea Righi
2026-10-16 19:03 ` Alexei Starovoitov
2026-10-16 19:52 ` Andrii Nakryiko
2026-10-18 0:52 ` Alexei Starovoitov
2026-10-19 8:49 ` Andrea Righi
2026-10-19 16:19 ` Andrii Nakryiko
2026-10-19 16:58 ` Alexei Starovoitov [this message]
2026-10-19 8:44 ` Andrea Righi
2026-10-19 19:32 ` Alexei Starovoitov
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