[Users] NVMe and Virtuozzo 7

Konstantin Khorenko khorenko at virtuozzo.com
Fri Aug 26 12:19:46 PDT 2016


Hi Nick,

i'm not sure i fully understand which exact latest changes in NVMe driver your are talking about =>
assuming you are right and RedHat has not backported some changes yet that you need.

As well i don't know what performance issues you are taking about.
Brief googling brought me to https://access.redhat.com/solutions/1269473
But there is quite a good workaround and it does not require driver update.

BTW, driver version in RHEL7 kernel (in case you have not checked):
# modinfo nvme
filename:       /lib/modules/3.10.0-327.22.2.vz7.16.2/kernel/drivers/block/nvme.ko
version:        1.0


So, in case you've really checked that you need a new driver (this means - have a test which works on your hardware slow on RHEL7 kernel and works fast on some other kernel 
(mainstream?)), well, just try to compile new driver against Virtuozzo 7 kernel - and that's it.

We do not touch NVMe driver in Virtuozzo patchset => our changes should not prevent the compilation.

Good luck.

--
Best regards,

Konstantin Khorenko,
Virtuozzo Linux Kernel Team

On 08/24/2016 02:35 AM, Nick Knutov wrote:
>
> As far as I understand - Virtuozzo 7 kernel DOES NOT contain latest NVMe
> driver and RHEL 7 kernel has some speed problerms with NVMe.
>
> Are there any official recomendations or suggestions from Openvz team?
>


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