From: Sagi Grimberg <sagi@grimberg.me>
To: Aurelien Aptel <aaptel@nvidia.com>,
David Howells <dhowells@redhat.com>,
netdev@vger.kernel.org
Cc: Alexander Duyck <alexander.duyck@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
David Ahern <dsahern@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Willem de Bruijn <willemb@google.com>,
Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@fb.com>,
Christoph Hellwig <hch@lst.de>,
Chaitanya Kulkarni <kch@nvidia.com>,
linux-nvme@lists.infradead.org
Subject: Re: [PATCH net-next v3 10/18] nvme/host: Use sendmsg(MSG_SPLICE_PAGES) rather then sendpage
Date: Thu, 29 Jun 2023 17:49:46 +0300 [thread overview]
Message-ID: <a1b7984a-d0a0-087c-2db9-6dbb6400a2bb@grimberg.me> (raw)
In-Reply-To: <253mt0il43o.fsf@mtr-vdi-124.i-did-not-set--mail-host-address--so-tickle-me>
> Hi David,
>
> David Howells <dhowells@redhat.com> writes:
>> When transmitting data, call down into TCP using a single sendmsg with
>> MSG_SPLICE_PAGES to indicate that content should be spliced rather than
>> performing several sendmsg and sendpage calls to transmit header, data
>> pages and trailer.
>
> This series makes my kernel crash.
>
> From the current net-next main branch:
>
> commit 9ae440b8fdd6772b6c007fa3d3766530a09c9045 (HEAD)
> Merge: b545a13ca9b2 b848b26c6672
> Author: Jakub Kicinski <kuba@kernel.org>
> Date: Sat Jun 24 15:50:21 2023 -0700
>
> Merge branch 'splice-net-switch-over-users-of-sendpage-and-remove-it'
>
>
> Steps to reproduce:
>
> * connect a remote nvme null block device (nvmet) with 1 IO queue to keep
> things simple
> * open /dev/nvme0n1 with O_RDWR|O_DIRECT|O_SYNC
> * write() a 8k buffer or 4k buffer
Most likely this also reproduces with blktests?
https://github.com/osandov/blktests
simple way to check is to run:
nvme_trtype=tcp ./check nvme
This runs nvme tests over nvme-tcp.
No need for network, disk or anything. It runs
both nvme and nvmet over the lo device..
next prev parent reply other threads:[~2023-06-29 14:49 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-20 14:53 [PATCH net-next v3 00/18] splice, net: Switch over users of sendpage() and remove it David Howells
2023-06-20 14:53 ` [PATCH net-next v3 01/18] net: Copy slab data for sendmsg(MSG_SPLICE_PAGES) David Howells
2023-06-22 18:12 ` Jakub Kicinski
2023-06-22 18:28 ` Alexander Duyck
2023-06-22 19:40 ` David Howells
2023-06-22 20:28 ` Jakub Kicinski
2023-06-22 22:54 ` David Howells
2023-06-23 2:11 ` Jakub Kicinski
2023-06-23 9:08 ` David Howells
2023-06-23 9:52 ` Paolo Abeni
2023-06-23 10:06 ` David Howells
2023-06-23 10:21 ` Paolo Abeni
2023-06-23 8:08 ` Paolo Abeni
2023-06-23 9:06 ` David Howells
2023-06-23 9:37 ` Paolo Abeni
2023-06-23 10:00 ` David Howells
2023-06-20 14:53 ` [PATCH net-next v3 02/18] net: Display info about MSG_SPLICE_PAGES memory handling in proc David Howells
2023-06-23 8:18 ` Paolo Abeni
2023-06-23 9:42 ` David Howells
2023-06-20 14:53 ` [PATCH net-next v3 03/18] tcp_bpf, smc, tls, espintcp: Reduce MSG_SENDPAGE_NOTLAST usage David Howells
2023-06-20 14:53 ` [PATCH net-next v3 04/18] siw: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage to transmit David Howells
2023-06-21 8:57 ` Bernard Metzler
2023-06-20 14:53 ` [PATCH net-next v3 05/18] ceph: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage David Howells
2023-06-20 14:53 ` [PATCH net-next v3 06/18] net: Use sendmsg(MSG_SPLICE_PAGES) not sendpage in skb_send_sock() David Howells
2023-06-20 14:53 ` [PATCH net-next v3 07/18] ceph: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage() David Howells
2023-06-20 14:53 ` [PATCH net-next v3 08/18] rds: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage David Howells
2023-06-20 14:53 ` [PATCH net-next v3 09/18] dlm: " David Howells
2023-06-20 14:53 ` [PATCH net-next v3 10/18] nvme/host: Use sendmsg(MSG_SPLICE_PAGES) rather then sendpage David Howells
2023-06-21 10:15 ` Sagi Grimberg
2023-06-21 12:35 ` David Howells
2023-06-21 14:05 ` Sagi Grimberg
2023-06-29 14:45 ` Aurelien Aptel
2023-06-29 14:49 ` Sagi Grimberg [this message]
2023-06-29 15:02 ` Aurelien Aptel
2023-06-29 21:23 ` David Howells
2023-06-29 21:33 ` Sagi Grimberg
2023-06-29 21:34 ` David Howells
2023-06-29 23:43 ` Jakub Kicinski
2023-06-30 16:10 ` Nathan Chancellor
2023-06-30 16:14 ` Jakub Kicinski
2023-06-30 19:28 ` Nathan Chancellor
2023-07-07 20:45 ` Nick Desaulniers
2023-06-20 14:53 ` [PATCH net-next v3 11/18] nvme/target: " David Howells
2023-06-20 14:53 ` [PATCH net-next v3 12/18] smc: Drop smc_sendpage() in favour of smc_sendmsg() + MSG_SPLICE_PAGES David Howells
2023-06-20 14:53 ` [PATCH net-next v3 13/18] ocfs2: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage() David Howells
2023-06-20 14:53 ` [PATCH net-next v3 14/18] drbd: " David Howells
2023-06-20 14:53 ` [PATCH net-next v3 15/18] drdb: Send an entire bio in a single sendmsg David Howells
2023-06-20 14:53 ` [PATCH net-next v3 16/18] iscsi: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage David Howells
2023-06-20 14:53 ` [PATCH net-next v3 18/18] net: Kill MSG_SENDPAGE_NOTLAST David Howells
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