netdev - Re: [PATCH net-next 0/6] vhost: accelerate metadata access

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 30 May 2019 11:07:30 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jasowang@...hat.com
Cc:     mst@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, peterx@...hat.com,
        James.Bottomley@...senpartnership.com, hch@...radead.org,
        jglisse@...hat.com, linux-mm@...ck.org,
        linux-arm-kernel@...ts.infradead.org, linux-parisc@...r.kernel.org,
        christophe.de.dinechin@...il.com, jrdr.linux@...il.com
Subject: Re: [PATCH net-next 0/6] vhost: accelerate metadata access

From: Jason Wang <jasowang@...hat.com>
Date: Fri, 24 May 2019 04:12:12 -0400

> This series tries to access virtqueue metadata through kernel virtual
> address instead of copy_user() friends since they had too much
> overheads like checks, spec barriers or even hardware feature
> toggling like SMAP. This is done through setup kernel address through
> direct mapping and co-opreate VM management with MMU notifiers.
> 
> Test shows about 23% improvement on TX PPS. TCP_STREAM doesn't see
> obvious improvement.

I'm still waiting for some review from mst.

If I don't see any review soon I will just wipe these changes from
patchwork as it serves no purpose to just let them rot there.

Thank you.