Hi, I am trying Grub2 EFI - this is on a custom platform. On 1.99-rc1, compared to Legacy grub, loading image, in particular initrd image from a USB takes a very long. Our initrd image is about 160M and it is taking about 2 mins to load this image. Turning on "set debug=all" in the grub.cfg file, I see that all the time is being spent in reading the USB. Looking at the source, I think the issue is the value set for GRUB_DISK_CACHE_SIZE in include/grub/disk.h Currently this is what it is set to:
include/grub/disk.h <snip> /* The size of a disk cache in sector units. */ #define GRUB_DISK_CACHE_SIZE 8 #define GRUB_DISK_CACHE_BITS 3 <snip> I tried changing this value to 8192 - and the time it took to load the same image came down to 10 secs ! /* The size of a disk cache in sector units. */ #define GRUB_DISK_CACHE_SIZE 8192 #define GRUB_DISK_CACHE_BITS 13 I am not sure of the reason for setting the cache size to a low value and any possible issues in increasing this size. Appreciate any input on this. Thanks, -Aravind Insert mode _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
