From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2DCDC219E8; Fri, 27 Jun 2025 00:49:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750985391; cv=none; b=lGx63vOH+5zbJYAg+3OpqBbLRLwchVGSe+K8ZENfrKrtSNkDhI9Z/1Dnr+2QOYrXqQThpa3jE06xA17G1f+f6Hg2tEKoQGItB6nR6RbavNuzqbGu8A4ItKvCYDWB9AZZEFD9ARiKYmOfnXfBa2dn4qXZKe1wFCmNAjvxuV+Z19o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750985391; c=relaxed/simple; bh=2mFT3JPm8NqU5vwR61bPE8xlg3A57QqzEU7GhQm5UYI=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=g4wDkCD6MC2lohuXA+QY/RgvsyVRlXVYL2bbGRaBqyoPM2OEMeekN+kExYTleOU7wbGlThOAeGiJ5+gmhEipa2XrTV3BpXmN7uJq24nmw5uWW6TtBCtvm1hAljEpPUBDlV4PDBcQzi1EqaDtKeT+D+TIRGBBqFr9NDCSv9drZtM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cTI9STuF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cTI9STuF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FCC2C4CEEB; Fri, 27 Jun 2025 00:49:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750985390; bh=2mFT3JPm8NqU5vwR61bPE8xlg3A57QqzEU7GhQm5UYI=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=cTI9STuFEmWrxrUScipw1SpUTxIcKU1+qT6CWh0gVIMz4rOoJkysBarsmb4pT80VR YGSaurNmFEJJrQD6gwIF32KNfyZR5uRwAA86wUrCQna45hkkDRAjXoq5cWCRqzZ7aC kBgS7xhraFFzbmFS2+VlE1thlNHsq1aQz2D3PnJ1LpvHRMvxk3akRDHdJo69gg8+wC ewgNJudm1FuRXo65uUU+IE6DM5kxBhKt8MT7a0gJw0EVfUS9MHVTPwl180rRndQ5c3 GY/PsbOOFb3eyHYV7R33bdeDvC0piMx6ptBcfCOZuDwKIBkz3MxZkUv/T165mQ4FeH /nTlQjnQrKyJQ== Date: Thu, 26 Jun 2025 17:49:48 -0700 From: Jakub Kicinski To: Byungchul Park Cc: willy@infradead.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel_team@skhynix.com, almasrymina@google.com, ilias.apalodimas@linaro.org, harry.yoo@oracle.com, hawk@kernel.org, akpm@linux-foundation.org, davem@davemloft.net, john.fastabend@gmail.com, andrew+netdev@lunn.ch, asml.silence@gmail.com, toke@redhat.com, tariqt@nvidia.com, edumazet@google.com, pabeni@redhat.com, saeedm@nvidia.com, leon@kernel.org, ast@kernel.org, daniel@iogearbox.net, david@redhat.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, horms@kernel.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, vishal.moola@gmail.com, hannes@cmpxchg.org, ziy@nvidia.com, jackmanb@google.com Subject: Re: [PATCH net-next v7 7/7] netmem: introduce a netmem API, virt_to_head_netmem() Message-ID: <20250626174948.1fa2ce34@kernel.org> In-Reply-To: <20250625043350.7939-8-byungchul@sk.com> References: <20250625043350.7939-1-byungchul@sk.com> <20250625043350.7939-8-byungchul@sk.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 25 Jun 2025 13:33:50 +0900 Byungchul Park wrote: > To eliminate the use of struct page in page pool, the page pool code > should use netmem descriptor and APIs instead. > > As part of the work, introduce a netmem API to convert a virtual address > to a head netmem allowing the code to use it rather than the existing > API, virt_to_head_page() for struct page. nit: this one needs a caller for the new function to be merged