lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ZjpVfPqGNfE5N4bl@infradead.org>
Date: Tue, 7 May 2024 09:23:24 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Jason Gunthorpe <jgg@...pe.ca>
Cc: Pavel Begunkov <asml.silence@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Mina Almasry <almasrymina@...gle.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-alpha@...r.kernel.org, linux-mips@...r.kernel.org,
	linux-parisc@...r.kernel.org, sparclinux@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Richard Henderson <richard.henderson@...aro.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matt Turner <mattst88@...il.com>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	Helge Deller <deller@....de>, Andreas Larsson <andreas@...sler.com>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	Ilias Apalodimas <ilias.apalodimas@...aro.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Arnd Bergmann <arnd@...db.de>, Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	John Fastabend <john.fastabend@...il.com>,
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>,
	Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	David Ahern <dsahern@...nel.org>,
	Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	Shuah Khan <shuah@...nel.org>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>,
	Amritha Nambiar <amritha.nambiar@...el.com>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Alexander Mikhalitsyn <alexander@...alicyn.com>,
	Kaiyuan Zhang <kaiyuanz@...gle.com>,
	Christian Brauner <brauner@...nel.org>,
	Simon Horman <horms@...nel.org>,
	David Howells <dhowells@...hat.com>,
	Florian Westphal <fw@...len.de>,
	Yunsheng Lin <linyunsheng@...wei.com>,
	Kuniyuki Iwashima <kuniyu@...zon.com>, Jens Axboe <axboe@...nel.dk>,
	Arseniy Krasnov <avkrasnov@...utedevices.com>,
	Aleksander Lobakin <aleksander.lobakin@...el.com>,
	Michael Lass <bevan@...co.net>, Jiri Pirko <jiri@...nulli.us>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Richard Gobert <richardbgobert@...il.com>,
	Sridhar Samudrala <sridhar.samudrala@...el.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Johannes Berg <johannes.berg@...el.com>,
	Abel Wu <wuyun.abel@...edance.com>,
	Breno Leitao <leitao@...ian.org>, David Wei <dw@...idwei.uk>,
	Shailend Chand <shailend@...gle.com>,
	Harshitha Ramamurthy <hramamurthy@...gle.com>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Jeroen de Borst <jeroendb@...gle.com>,
	Praveen Kaligineedi <pkaligineedi@...gle.com>
Subject: Re: [RFC PATCH net-next v8 02/14] net: page_pool: create hooks for
 custom page providers

On Tue, May 07, 2024 at 01:18:57PM -0300, Jason Gunthorpe wrote:
> On Tue, May 07, 2024 at 05:05:12PM +0100, Pavel Begunkov wrote:
> > > even in tree if you give them enough rope, and they should not have
> > > that rope when the only sensible options are page/folio based kernel
> > > memory (incuding large/huge folios) and dmabuf.
> > 
> > I believe there is at least one deep confusion here, considering you
> > previously mentioned Keith's pre-mapping patches. The "hooks" are not
> > that about in what format you pass memory, it's arguably the least
> > interesting part for page pool, more or less it'd circulate whatever
> > is given. It's more of how to have a better control over buffer lifetime
> > and implement a buffer pool passing data to users and empty buffers
> > back.
> 
> Isn't that more or less exactly what dmabuf is? Why do you need
> another almost dma-buf thing for another project?

That's the exact point I've been making since the last round of
the series.  We don't need to reinvent dmabuf poorly in every
subsystem, but instead fix the odd parts in it and make it suitable
for everyone.


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ