Question on mlx5-ib auto load

Question on mlx5-ib auto load

[Sagi Grimberg]

Did anyone notice that mlx5_ib does not auto load at boot time?

While mlx5_core requests mlx5_ib, mlx5_ib still does not load
at boot time (only when reloading mlx5_core).

I noticed it today, and could only get around it by adding
mlx5_ib to /etc/modules-load.d/modules.conf

Is there something I'm missing?

Cheers,
Sagi
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Re: Question on mlx5-ib auto load

[Jason Gunthorpe]

On Sun, Sep 24, 2017 at 04:43:58PM +0300, Sagi Grimberg wrote:
> Did anyone notice that mlx5_ib does not auto load at boot time?
>
> While mlx5_core requests mlx5_ib, mlx5_ib still does not load
> at boot time (only when reloading mlx5_core).

I tested this recently, and it does work.

Be aware, that if you have mlx5_core in your initrd then you must also
have mlx5_ib in the initrd as well, otherwise it will not work.

Not all distros are doing this yet. eg there are patches for Debian
derived.

Jason
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Re: Question on mlx5-ib auto load

[Leon Romanovsky]

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On Sun, Sep 24, 2017 at 04:43:58PM +0300, Sagi Grimberg wrote:
> Did anyone notice that mlx5_ib does not auto load at boot time?
>
> While mlx5_core requests mlx5_ib, mlx5_ib still does not load
> at boot time (only when reloading mlx5_core).
>
> I noticed it today, and could only get around it by adding
> mlx5_ib to /etc/modules-load.d/modules.conf

It is supposed to work automatically without need to add anything
(except rxe) in the modules-load.d.

>
> Is there something I'm missing?

We had an opposite bug - the removal didn't work.
https://lkml.org/lkml/2017/9/9/123

What is your OS, rdma-core version and kernel version?

Thanks

>
> Cheers,
> Sagi
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> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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Re: Question on mlx5-ib auto load

[Sagi Grimberg]

>> Did anyone notice that mlx5_ib does not auto load at boot time?
>>
>> While mlx5_core requests mlx5_ib, mlx5_ib still does not load
>> at boot time (only when reloading mlx5_core).
>>
>> I noticed it today, and could only get around it by adding
>> mlx5_ib to /etc/modules-load.d/modules.conf
> 
> It is supposed to work automatically without need to add anything
> (except rxe) in the modules-load.d.
> 
>>
>> Is there something I'm missing?
> 
> We had an opposite bug - the removal didn't work.
> https://lkml.org/lkml/2017/9/9/123
> 
> What is your OS, rdma-core version and kernel version?

# cat /etc/os-release
NAME="Ubuntu"
VERSION="16.04 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
UBUNTU_CODENAME=xenial

# uname -a
Linux client 4.14.0-rc1+ #193 SMP Sun Sep 24 11:24:38 IDT 2017 x86_64 
x86_64 x86_64 GNU/Linux

# dpkg -l | grep rdma-core
rc  rdma-core                         14-1 
amd64        RDMA core userspace infrastructure and documentation
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Re: Question on mlx5-ib auto load

[Jason Gunthorpe]

On Sun, Sep 24, 2017 at 10:49:25PM +0300, Sagi Grimberg wrote:

> # cat /etc/os-release
> NAME="Ubuntu"
> VERSION="16.04 LTS (Xenial Xerus)"

This has the initrd problem I mentioned.

Jason
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Re: Question on mlx5-ib auto load

[Sagi Grimberg]

>> # cat /etc/os-release
>> NAME="Ubuntu"
>> VERSION="16.04 LTS (Xenial Xerus)"
> 
> This has the initrd problem I mentioned.

Well, I guess I'll keep the local workaround then...
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Re: Question on mlx5-ib auto load

[Benjamin Drung]

Am Sonntag, den 24.09.2017, 13:57 -0600 schrieb Jason Gunthorpe:
> On Sun, Sep 24, 2017 at 10:49:25PM +0300, Sagi Grimberg wrote:
> 
> > # cat /etc/os-release
> > NAME="Ubuntu"
> > VERSION="16.04 LTS (Xenial Xerus)"
> 
> This has the initrd problem I mentioned.

which is following bug:
https://bugs.debian.org/871595
https://launchpad.net/bugs/1719302

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