[Bug 944347] Re: linux and initrd load very slowly on UEFI system

[Manoj Iyer]

GRUB_DISK_CACHE_SIZE seems to be size of disk cache size in 512byte
units, so it could be as large as supported sector read size. I think
currently we can do 4K sector reads on some disks, ( I hope my math is
right) so you could only have:

#define GRUB_DISK_CACHE_BITS	8
instead of 
#define GRUB_DISK_CACHE_BITS	10

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https://bugs.launchpad.net/bugs/944347

Title:
  linux and initrd load very slowly on UEFI system

Status in “grub2” package in Ubuntu:
  New

Bug description:
  On a Intel Tunnel Mountain system, grub2 loads from disk very slowly
  when booting with UEFI:  about 53 seconds to execute a pair of "linux"
  and "initrd" commands.

  Expected behavior:
      Load time for linux and initrd should be on order of 1 second.

  Problem observed with:
      grub2 (oneiric) 1.99-12ubuntu5
      grub2 (precise) 1.99-14ubuntu2
      Intel Tunnel Mountain UEFI BIOS version SDV.TM.B8 or SDV.TM.B9

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