Re: grub.pxe, ARP-after-boot, DMA, and trouble

2012-04-11 Thread Daniel Kahn Gillmor
On Sat, 07 Apr 2012 01:36:44 -0400, Daniel Kahn Gillmor d...@fifthhorseman.net wrote: In particular, i suspect that *after* the bootloader has turned over control to the kernel (memtest in this case), the PXE-driven NIC is continuing to DMA received packets into active RAM. phcoder sent me

grub.pxe, ARP-after-boot, DMA, and trouble

2012-04-06 Thread Daniel Kahn Gillmor
I've been recently using grub.pxe (from debian's version 1.99-17) according to the instructions at [0] to boot memtest86+ [1] (from debian's version 4.20-1.1) over the network on x86 machines. Due to the problems described below, i'm using a serial console. The grub configuration is very simple: