From: "David Hildenbrand (Arm)" <david@kernel.org>
To: jim.cromie@gmail.com, "Andrew Morton" <akpm@linux-foundation.org>,
"Pablo Neira Ayuso" <pablo@netfilter.org>,
"Florian Westphal" <fw@strlen.de>, "Phil Sutter" <phil@nwl.cc>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Eduard Zingerman" <eddyz87@gmail.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"Matthew Brost" <matthew.brost@intel.com>,
"Boris Brezillon" <boris.brezillon@collabora.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>, "Will Deacon" <will@kernel.org>,
"Waiman Long" <longman@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Simon Horman" <horms@kernel.org>,
"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>,
"John Fastabend" <john.fastabend@gmail.com>,
"Thomas Hellström" <thomas.hellstrom@linux.intel.com>,
"Alice Ryhl" <aliceryhl@google.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Boqun Feng" <boqun@kernel.org>,
"Matthew Wilcox" <willy@infradead.org>, "Zi Yan" <ziy@nvidia.com>
Cc: netfilter-devel@vger.kernel.org, bpf@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, coreteam@netfilter.org,
netdev@vger.kernel.org
Subject: Re: [PATCH 0/9] lib/folio_pool: Direct-Map Large Folio Pool & Scratchpad bump allocators
Date: Mon, 17 Aug 2026 20:17:37 +0200 [thread overview]
Message-ID: <85302865-4181-43d4-9c38-eb6ac57e3aa7@kernel.org> (raw)
In-Reply-To: <20260817-folio-pool-v1-v1-0-0c1d230aa3af@gmail.com>
On 8/17/26 19:22, Jim Cromie via B4 Relay wrote:
> Introduce two light-weight bump allocators backed directly by compound
> folio pages from the buddy allocator (skipping SLUB metadata overhead):
We are running into a bit of a naming problem here: folios are really supposed
to describe things that we will map to user space, whereby we have to track
mapping/index/mapcount etc. That's really just anon + pagecache memory.
Right now that naming difference doesn't matter, because each compound page
really is a folio.
But once we start decoupling folios from the rest (memdescs), we really only
expect anon+pagecache to resemble "folios".
There will be other compound page types (similar to slab pages), and things like
page_folio() will fail for them (like slab pages). And we are actually working
on making page_folio() fail earlier for anything that didn't go through
page_rmappable_folio() as part of the (folio) allocation.
So, does what you do here fit the definition of folios, or is it really just
some kind of compound pages?
--
Cheers,
David
next prev parent reply other threads:[~2026-08-17 18:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 17:22 Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 1/9] lib/folio_pool: Introduce " Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 2/9] netfilter/nf_tables: Add folio_scratchpad collector to struct nftables_pernet Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 3/9] bpf/verifier: Route verifier stack state node allocations to folio_pool Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 4/9] drm/gpuvm: Route gpuva_op allocations to folio_scratchpad Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 5/9] bpf/syscall: Route generic_map_update_batch key/value " Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 6/9] locking/lockdep: Fallback to folio_pool in alloc_list_entry when static pool is full Jim Cromie via B4 Relay
2026-08-17 21:01 ` Peter Zijlstra
2026-08-17 17:22 ` [PATCH 7/9] locking/lockdep: Traverse adjacency lists directly in zap_class() Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 8/9] locking/lockdep: Shrink static list_entries array to early bootstrap buffer Jim Cromie via B4 Relay
2026-08-17 17:22 ` [PATCH 9/9] locking/lockdep: Migrate and compact boot-time dependency graph from __initdata Jim Cromie via B4 Relay
2026-08-17 18:17 ` David Hildenbrand (Arm) [this message]
2026-08-17 18:34 ` [PATCH 0/9] lib/folio_pool: Direct-Map Large Folio Pool & Scratchpad bump allocators Matthew Wilcox
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