[CentOS] PXE vmlinuz kernel doesn't recognize memory in Intel NUC?

[Bruce Ferrell]

On 03/15/2017 06:08 PM, Locane wrote:
> Hello all!  I'm hoping someone can help.  I'm having 2 issues; first:
>
> When trying to load a CentOS LiveCD via PXE on an Intel NUC (NUC6CAY), I
> get:
> "Not enough memory to load specified image".  The image is 1.1 gigs, and
> there is 16 gigs of memory in the NUC.
>
> To combat this, I found this forum post
> <https://www.centos.org/forums/viewtopic.php?t=1398> which suggested using
> the "mem=" kernel parameter to manually set it.
>
> The next problem I get is one of two things:
>
> On a normal working system, I get the dots loading in PXE, then it freezes
> on "ready." forever
> On the NUC, I get a sqaushfs crash saying that the image is unusable.
>
> My questions are:
>
> Has anyone successfully used the "mem=" parameter in a PXE environment?
> I wasn't even aware that drivers were necessary for a kernel image to read
> RAM; I'd thought this was something that was just inherent.  Does the
> CentOS PXE kernel need to be updated?
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I do a lot of PXE at home.  Is it possible the tftp of the image is failing somehow?  I had problems with image size and had to switch to:

http://www.kernel.org/pub/software/network/tftp/

found in tftp-server

I've included my pxelinux.cfg/default for Centos 6.4 below:

# Centos 6.4
   label centos6
   kernel centos/6.4/64/vmlinuz
   append initrd=centos/6.4/64/initrd.img ramdisk_size=100000 text ks=http://192.168.0.134/ks/ks6-64.cfg