My custom Linux kernel takes 3 secs to boot on my Thinkpad. The BIOS takes around 5 to get to the 1st stage boot loader. GRUB takes 10 to load itself.
I was thinking the following: Write a bootloader that takes the kernel and initrd from the raw hard drive like an embedded system. So it would go like this:
MBR_PARTTABLE_KERNEL_INITRD_FIRSTPART
That way it does not need to mount a partition, read from it, read the 2nd stage bootloader, read that one and then load kernel and boot. This way i can just load in the kernel raw from the SSD.
the first stage of the bootloader is limited to 510 bytes.
there's a reason the second stage exists.
Alexander Rivera
Use LiLO
Grayson Watson
Good luck doing all that in 510 bytes mate. There's a reason there's 2 stages.You could definitely write your own minimal second stage but trust me when I say it's not worth the effort.
Benjamin Garcia
GRUB is a 2 stage bootloader. MBR stage 1 reads disk and loads GRUB stage 2 into memory from disk, as a kernel and initrd cant fit into the mbr
move kernel from disk to memory and execute it
Andrew Lee
my point was that you're not going to fit your entire boot loader into the mbr - you will still need 2 stages.
Oliver Hughes
just use efi :^)
Bentley Collins
>The BIOS takes around 5 to get to the 1st stage boot loader. GRUB takes 10 to load itself. What the fuck did you fuck up? Even on an HDD GRUB never took that long to start up.
Jose Wright
is it really worth it though? how often do you restart your computer?
Christian Lewis
works on my musheen.
Justin Jenkins
>10 seconds to load My shitbox at home boots grub in like three seconds.
Adam Cruz
Get rid of the initramfs (make sure you compile anything you need for booting like filesystems and sata drivers statically, i.e not as modules) and use lilo.
Bentley Kelly
Compile your kernel as an efi executable and boot it directly from EFI.
Nathaniel Mitchell
My Libreboot BIOS uses GRUB as the bootloader. It's nice.
Michael Collins
Never turn off your computer.
Bentley White
It's orphaned and no longer being maintained by the developer.
Just use GRUB2.
Eli Long
>GRUB takes 10 to load itself What
Gavin Lopez
MBR isn't fixed size though?
Parker Howard
Are you sure you're not confusing the wait time of GRUB? You can adjust that, you know?
Jeremiah Wright
If you have EFI capability, switch to an EFI Stub Loader like rEFInd and a GUID Partition Table. Otherwise, just stick with Grub. It sucks but it works.
Austin Roberts
What's the problem with efi? I have found refind the most straight forward
Gavin Rivera
Encrypted drive
Benjamin Rogers
if using an old thinkpad and it works, what does it matter that it is not maintained?
