[Bug 1314134] Re: network stack never yields control on busy networks

[Colin Watson]

** Changed in: grub2 (Ubuntu Trusty)
       Status: Triaged => In Progress

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Title:
  network stack never yields control on busy networks

Status in “grub2” package in Ubuntu:
  Fix Committed
Status in “grub2” source package in Trusty:
  In Progress

Bug description:
  [Impact] GRUB's network stack tries to process all incoming packets, and thus never or rarely yields control back to other parts of GRUB when the network is busy with e.g. lots of ARP traffic.
  [Test Case] Use GRUB to netboot a system on a busy network; ensure that it is responsive.  (I've had reports of 90-minute delays in interactive response on some systems, so in those cases the difference should be dramatic and easily observable.)
  [Regression Potential] Confined to netbooting.

  These upstream patches should fix this:

    https://lists.gnu.org/archive/html/grub-devel/2014-01/msg00119.html
    https://lists.gnu.org/archive/html/grub-devel/2014-01/msg00118.html

  I plan to backport these for 14.04.1.

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