linux-kernel - 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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <c233324c-cb66-c0ab-45c4-6e6e0499bb22@redhat.com>
Date:   Mon, 10 Jun 2019 11:50:45 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     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, davem@...emloft.net, 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


On 2019/6/6 上午4:27, Michael S. Tsirkin wrote:
> On Fri, May 24, 2019 at 04:12:12AM -0400, Jason Wang wrote:
>> Hi:
>>
>> 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.
>>
>> Thanks
> Thanks this is queued for next.
>
> Did you want to rebase and repost packed ring support on top?
> IIUC it's on par with split ring with these patches.
>
>

Yes, it's on the way.

Thanks