Hi David,
David Howells <dhowells@xxxxxxxxxx> 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@xxxxxxxxxx>
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..
