netdev - [PATCH V2 net-next 0/3] RDS: optimized notification for zerocopy completion

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-next>] [day] [month] [year] [list]

Message-Id: <cover.1519399473.git.sowmini.varadhan@oracle.com>
Date:   Fri, 23 Feb 2018 14:08:12 -0800
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     netdev@...r.kernel.org, willemdebruijn.kernel@...il.com
Cc:     davem@...emloft.net, sowmini.varadhan@...cle.com,
        santosh.shilimkar@...cle.com
Subject: [PATCH V2 net-next 0/3] RDS: optimized notification for zerocopy completion

RDS applications use predominantly request-response, transacation 
based IPC, so that ingress and egress traffic are well-balanced,
and it is possible/desirable to reduce system-call overhead by
piggybacking the notifications for zerocopy completion response
with data. 

Moreover, it has been pointed out that socket functions block
if sk_err is non-zero, thus if the RDS code does not plan/need
to use sk_error_queue path for completion notification, it
is preferable to remove the sk_errror_queue related paths in
RDS.

Both of these goals are implemented in this series.

Sowmini Varadhan (3):
  selftests/net: revert the zerocopy Rx path for PF_RDS
  rds: deliver zerocopy completion notification with data
  selftests/net: reap zerocopy completions passed up as ancillary data.

 include/uapi/linux/errqueue.h              |    2 -
 include/uapi/linux/rds.h                   |    7 ++
 net/rds/af_rds.c                           |    7 ++-
 net/rds/message.c                          |   35 ++++------
 net/rds/rds.h                              |    2 +
 net/rds/recv.c                             |   34 +++++++++-
 tools/testing/selftests/net/msg_zerocopy.c |  109 +++++++++++-----------------
 7 files changed, 103 insertions(+), 93 deletions(-)