Re: [bisected, regression] 3.17-rc2 kernel doesn't load initramfs with EFI stub boot

[Matt Fleming <matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>]

On Wed, 27 Aug, at 12:02:37PM, Calvin Walton wrote:
> Hi all,
> 
> When I tried booting the 3.17-rc2 kernel on my Lenovo ThinkPad T440p 
> (16gb ram) via Gummiboot/EFI stub, it failed with an error saying that 
> it could not mount root. A little investigation revealed that the 
> initramfs did not load, so mounting by filesystem UUID failed.
> 
> A video of the failed boot is available here, if you're curious:
> https://www.youtube.com/watch?v=wOHTvg8Tico
> 
> I've bisected the change, and it has led me to:
> 
> 4bf7111f50167133a71c23530ca852a41355e739 is the first bad commit
> commit 4bf7111f50167133a71c23530ca852a41355e739
> Author: Yinghai Lu <yinghai-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Date:   Sat Jun 14 12:23:41 2014 -0700
> 
>     x86/efi: Support initrd loaded above 4G
> 
>     For boot efi kernel directly without bootloader.
>     If the kernel support XLF_CAN_BE_LOADED_ABOVE_4G, we should
>     not limit initrd under hdr->initrd_add_max.
> 
>     Signed-off-by: Yinghai Lu <yinghai-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>     Signed-off-by: Matt Fleming <matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> 
> This commit reverts cleanly on top of 3.17-rc2, and the resulting 
> kernel boots correctly.

Thanks for reporting this. Could you try the below commit and see
whether it fixes things for you?

  http://article.gmane.org/gmane.linux.kernel.efi/4524

-- 
Matt Fleming, Intel Open Source Technology Center