From: Tejun Heo <tj@kernel.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: David Vernet <void@manifault.com>,
Andrea Righi <arighi@nvidia.com>,
Changwoo Min <changwoo@igalia.com>,
Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <martin.lau@linux.dev>,
Kumar Kartikeya Dwivedi <memxor@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Emil Tsalapatis <emil@etsalapatis.com>,
sched-ext@lists.linux.dev, bpf@vger.kernel.org, x86@kernel.org,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 7/8] sched_ext: Sub-allocator over kernel-claimed BPF arena pages
Date: Wed, 20 May 2026 13:47:32 -1000 [thread overview]
Message-ID: <eaeb316b7a45956ed5f335050e6e9538@kernel.org> (raw)
In-Reply-To: <DIM6W7GRZK2N.14AH43S1XTFCG@gmail.com>
Hello,
On Mon, May 18, 2026 at 04:26:11PM -0700, Alexei Starovoitov wrote:
> Well, this gen_pool based allocator of arena memory is a temporary hack.
> It's ok for rare allocation like in this at scx init time, but not suitable
> for active arena management. We don't need to expose it beyond scx.
I see. Peter, as Alexei is already prototyping a slab-based arena
allocator, how about keeping the gen_pool layer scx-local for now? Once
the proper allocator lands, scx can switch to it and the custom piece
goes away.
Thanks.
--
tejun
next prev parent reply other threads:[~2026-05-20 23:47 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-17 21:12 [PATCHSET v2 sched_ext/for-7.2] bpf/arena: Direct kernel-side access Tejun Heo
2026-05-17 21:12 ` [PATCH 1/8] mm: Add ptep_try_install() for lockless empty-slot installs Tejun Heo
2026-05-18 8:06 ` David Hildenbrand (Arm)
2026-05-18 19:53 ` Tejun Heo
2026-05-19 8:00 ` David Hildenbrand (Arm)
2026-05-19 8:58 ` Tejun Heo
2026-05-19 9:05 ` David Hildenbrand (Arm)
2026-05-19 9:40 ` David Hildenbrand (Arm)
2026-05-19 17:11 ` Tejun Heo
2026-05-19 19:04 ` Alexei Starovoitov
2026-05-20 8:41 ` David Hildenbrand (Arm)
2026-05-20 14:31 ` Alexei Starovoitov
2026-05-20 21:22 ` David Hildenbrand (Arm)
2026-05-20 18:38 ` Tejun Heo
2026-05-20 21:29 ` David Hildenbrand (Arm)
2026-05-17 21:12 ` [PATCH 2/8] bpf: Recover arena kernel faults with scratch page Tejun Heo
2026-05-17 21:12 ` [PATCH 3/8] bpf: Add sleepable variant of bpf_arena_alloc_pages for kernel callers Tejun Heo
2026-05-17 21:12 ` [PATCH 4/8] bpf: Add bpf_struct_ops_for_each_prog() Tejun Heo
2026-05-17 21:12 ` [PATCH 5/8] bpf/arena: Add bpf_arena_map_kern_vm_start() and bpf_prog_arena() Tejun Heo
2026-05-17 21:12 ` [PATCH 6/8] sched_ext: Require an arena for cid-form schedulers Tejun Heo
2026-05-17 21:12 ` [PATCH 7/8] sched_ext: Sub-allocator over kernel-claimed BPF arena pages Tejun Heo
2026-05-18 7:20 ` Peter Zijlstra
2026-05-18 19:51 ` Tejun Heo
2026-05-18 23:26 ` Alexei Starovoitov
2026-05-20 23:47 ` Tejun Heo [this message]
2026-05-17 21:12 ` [PATCH 8/8] sched_ext: Convert ops.set_cmask() to arena-resident cmask Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2026-05-20 23:50 [PATCHSET v3 sched_ext/for-7.2] bpf/arena: Direct kernel-side access Tejun Heo
2026-05-20 23:50 ` [PATCH 7/8] sched_ext: Sub-allocator over kernel-claimed BPF arena pages Tejun Heo
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