Re: [RFC PATCH 4/4] i40e: don't open i40iw client for kdump

[Coiby Xu]

Hi Jakub,

Thank you for reviewing the patch!

On Tue, Feb 23, 2021 at 12:22:07PM -0800, Jakub Kicinski wrote:
> On Mon, 22 Feb 2021 15:07:01 +0800 Coiby Xu wrote:
> > i40iw consumes huge amounts of memory. For example, on a x86_64 machine,
> > i40iw consumed 1.5GB for Intel Corporation Ethernet Connection X722 for
> > for 1GbE while "craskernel=auto" only reserved 160M. With the module
> > parameter "resource_profile=2", we can reduce the memory usage of i40iw
> > to ~300M which is still too much for kdump.
> >
> > Disabling the client registration would spare us the client interface
> > operation open , i.e., i40iw_open for iwarp/uda device. Thus memory is
> > saved for kdump.
> >
> > Signed-off-by: Coiby Xu <coxu@xxxxxxxxxx>
>
> Is i40iw or whatever the client is not itself under a CONFIG which
> kdump() kernels could be reasonably expected to disable?

I'm not sure if I understand you correctly. Do you mean we shouldn't
disable i40iw for kdump?

--
Best regards,
Coiby