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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 30 Sep 2020 10:47:20 +0530 From: Anant Thazhemadam <anant.thazhemadam@...il.com> To: mst@...hat.com, jasowang@...hat.com, davem@...emloft.net, kuba@...nel.org, ast@...nel.org, daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com Cc: Anant Thazhemadam <anant.thazhemadam@...il.com>, linux-kernel-mentees@...ts.linuxfoundation.org, virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org Subject: [Linux-kernel-mentees][PATCH 0/2] reorder members of structures in virtio_net for optimization The structures virtnet_info and receive_queue have byte holes in middle, and their members could do with some rearranging (order-of-declaration wise) in order to overcome this. Rearranging the members helps in: * elimination the byte holes in the middle of the structures * reduce the size of the structure (virtnet_info) * have more members stored in one cache line (as opposed to unnecessarily crossing the cacheline boundary and spanning different cachelines) The analysis was performed using pahole. These patches may be applied in any order. Anant Thazhemadam (2): net: reorder members of virtnet_info for optimization net: reorder members of receive_queue in virtio_net for optimization drivers/net/virtio_net.c | 44 +++++++++++++++++++++------------------- 1 file changed, 23 insertions(+), 21 deletions(-) -- 2.25.1
Powered by blists - more mailing lists