From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: Jason Gunthorpe <jgg@ziepe.ca>,
Stephen Hemminger <stephen@networkplumber.org>
Cc: "Mina Almasry" <almasrymina@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"David Ahern" <dsahern@kernel.org>,
"Andy Lutomirski" <luto@kernel.org>,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
netdev@vger.kernel.org, linux-arch@vger.kernel.org,
linux-kselftest@vger.kernel.org,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Paolo Abeni" <pabeni@redhat.com>,
"Jesper Dangaard Brouer" <hawk@kernel.org>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Willem de Bruijn" <willemdebruijn.kernel@gmail.com>,
"Shuah Khan" <shuah@kernel.org>
Subject: Re: [Linaro-mm-sig] Re: [RFC PATCH 00/10] Device Memory TCP
Date: Thu, 27 Jul 2023 13:40:21 +0200 [thread overview]
Message-ID: <dfe4bae7-13a0-3c5d-d671-f61b375cb0b4@gmail.com> (raw)
In-Reply-To: <ZLhww+P+7zhTTUk7@ziepe.ca>
Am 20.07.23 um 01:24 schrieb Jason Gunthorpe:
> On Wed, Jul 19, 2023 at 10:57:11AM -0700, Stephen Hemminger wrote:
>
>> Naive idea.
>> Would it be possible for process to use mmap() on the GPU memory and then
>> do zero copy TCP receive some how? Or is this what is being proposed.
> It could be possible, but currently there is no API to recover the
> underlying dmabuf from the VMA backing the mmap.
Sorry for being a bit late, have been on vacation.
Well actually this was discussed before to work around problems with
Windows applications through wine/proton.
Not 100% sure what the outcome of that was, but if I'm not completely
mistaken getting the fd behind a VMA should be possible.
It might just not be the DMA-buf fd, because we use mmap() re-routing to
be able to work around problems with the reverse tracking of mappings.
Christian.
>
> Also you can't just take arbitary struct pages from any old VMA and
> make them "netmem"
>
> Jason
> _______________________________________________
> Linaro-mm-sig mailing list -- linaro-mm-sig@lists.linaro.org
> To unsubscribe send an email to linaro-mm-sig-leave@lists.linaro.org
next prev parent reply other threads:[~2023-07-27 11:40 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-10 22:32 [RFC PATCH 00/10] Device Memory TCP Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 01/10] dma-buf: add support for paged attachment mappings Mina Almasry
2023-07-11 7:59 ` Christian König
2023-07-11 11:44 ` Mina Almasry
2023-07-11 12:13 ` Christian König
2023-07-10 22:32 ` [RFC PATCH 02/10] dma-buf: add support for NET_RX pages Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 03/10] dma-buf: add support for NET_TX pages Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 04/10] net: add support for skbs with unreadable frags Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 05/10] tcp: implement recvmsg() RX path for devmem TCP Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 06/10] net: add SO_DEVMEM_DONTNEED setsockopt to release RX pages Mina Almasry
2023-07-16 23:57 ` Andy Lutomirski
2023-07-17 2:06 ` Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 07/10] tcp: implement sendmsg() TX path for for devmem tcp Mina Almasry
2023-07-10 22:32 ` [RFC PATCH 08/10] selftests: add ncdevmem, netcat for devmem TCP Mina Almasry
2023-07-10 22:33 ` [RFC PATCH 09/10] memory-provider: updates core provider API " Mina Almasry
2023-07-10 22:33 ` [RFC PATCH 10/10] memory-provider: add dmabuf devmem provider Mina Almasry
2023-07-17 2:41 ` [RFC PATCH 00/10] Device Memory TCP Andy Lutomirski
2023-07-18 17:32 ` Jakub Kicinski
2023-07-18 17:36 ` Mina Almasry
2023-07-18 18:06 ` Jason Gunthorpe
2023-07-18 18:15 ` Jakub Kicinski
2023-07-18 18:20 ` David Ahern
2023-07-18 18:29 ` Jakub Kicinski
2023-07-18 22:35 ` David Ahern
2023-07-18 22:45 ` Jakub Kicinski
2023-07-19 15:10 ` Mina Almasry
2023-07-19 17:57 ` Stephen Hemminger
2023-07-19 23:24 ` Jason Gunthorpe
2023-07-27 11:40 ` Christian König [this message]
2023-07-19 20:36 ` Jakub Kicinski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=dfe4bae7-13a0-3c5d-d671-f61b375cb0b4@gmail.com \
--to=ckoenig.leichtzumerken@gmail.com \
--cc=almasrymina@google.com \
--cc=arnd@arndb.de \
--cc=christian.koenig@amd.com \
--cc=davem@davemloft.net \
--cc=dri-devel@lists.freedesktop.org \
--cc=dsahern@kernel.org \
--cc=edumazet@google.com \
--cc=hawk@kernel.org \
--cc=ilias.apalodimas@linaro.org \
--cc=jgg@ziepe.ca \
--cc=kuba@kernel.org \
--cc=linaro-mm-sig@lists.linaro.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=luto@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=shuah@kernel.org \
--cc=stephen@networkplumber.org \
--cc=sumit.semwal@linaro.org \
--cc=willemdebruijn.kernel@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).