On Thu, Apr 24, 2014 at 03:07:33PM -0700, Ram Pai wrote:
> Grub can busy-loop and hang while network booting, if the network has
> some fair amount of activity. This is because grub's net module sniffs
> the network for packets, and busy-loops in receive_packets() till it
> finds network packet of type IP or IPV6. During this period grub will
> not respond to any user input, thus hanging up the system.
>
> The following patch lets grub to relax every few iterations, so that it
> can respond to other user inputs.
>
> Signed-off-by: Ram Pai <linux...@us.ibm.com>
>
> diff --git a/grub-core/net/net.c b/grub-core/net/net.c
> index 0e57e93..4b316fa 100644
> --- a/grub-2.02~beta2/grub-core/net/net.c
> +++ b/grub-2.02~beta2/grub-core/net/net.c
> @@ -1500,10 +1500,11 @@ grub_net_poll_cards_idle_real (void)
> FOR_NET_CARDS (card)
> {
> grub_uint64_t ctime = grub_get_time_ms ();
> + int stop_condition = 1;
>
> if (ctime < card->last_poll
> || ctime >= card->last_poll + card->idle_poll_delay_ms)
> - receive_packets (card, 0);
> + receive_packets (card, &stop_condition);
> }
> grub_net_tcp_retransmit ();
> }
There is a patch by Paulo that fixes the same
problem. http://marc.info/?l=grub-devel&m=139175231351317&w=2
Git commit d99d2f84166b0f60673d5c0714605a153946c0fc.
This patch is not needed, please ignore.
RP
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