I checked out the latest version of grub, built an image using grub-mknetdir,
and the ARP storm is from the efinet driver. The
code is stuck in the following loop in net/drivers/efi/efinet.c lines 43
through 66. efi_call_3 always returns a txbuf that does not match dev->txbuf,
and eif_call_7 is repeatedly called until the limit_time has been exceeded.
Any thoughts from the grub team on what could be the problem or what I should
do to continue to debug?
while (1)
{
txbuf = NULL;
st = efi_call_3 (net->get_status, net, 0, &txbuf);
if (st != GRUB_EFI_SUCCESS)
return grub_error (GRUB_ERR_IO,
N_("couldn't send network packet"));
if (txbuf == dev->txbuf)
{
dev->txbusy = 0;
break;
}
if (txbuf)
{
st = efi_call_7 (net->transmit, net, 0, dev->last_pkt_size,
dev->txbuf, NULL, NULL, NULL);
if (st != GRUB_EFI_SUCCESS)
return grub_error (GRUB_ERR_IO,
N_("couldn't send network packet"));
}
if (limit_time < grub_get_time_ms ())
return grub_error (GRUB_ERR_TIMEOUT,
N_("couldn't send network packet"));
}
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https://bugs.launchpad.net/bugs/1437353
Title:
UEFI network boot hangs at grub for adapter 82599ES 10-Gigabit
SFI/SFP+
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