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SubjectRe: [PATCH 1/2] x86/boot/compressed/64: Remove .bss/.pgtable from bzImage
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On Mon, 2020-04-06 at 10:44 +0200, Ard Biesheuvel wrote:
> On Mon, 6 Apr 2020 at 01:18, Arvind Sankar <nivedita@alum.mit.edu>
> wrote:
> > On Sun, Apr 05, 2020 at 10:42:46PM +0700, Sergey Shatunov wrote:
> > > This patch causes some strange things happens with my laptop.
> > >
> > > Cold boot crashed in some early initilization logic with message
> > > 'Failed to execute /esp/.../linux.efi: Buffer Too Small'.
> > > After couple reboots into firmware setup (bios) or hot reboot
> > > from other working kernel (without that commit) helps it to boot.
> > > During bisecting couple times I saw different message:
> > > 'exit_efi() failed; efi_main() failed', but above tricks helps it
> > > too.
>
> Could you please try adding 'efi=no_disable_early_pci_dma' to the
> kernel command line? The lack of BSS zeroization may result in that
> option to get inadvertently enabled, and it is known to break
> exit_boot() on some systems.

With 'efi=no_disable_early_pci_dma' it works again.

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