linux-kernel - Re: [PATCH 1/2] x86/boot/compressed/64: Remove .bss/.pgtable from bzImage

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Message-Id: <20200405154245.11972-1-me@prok.pw>
Date:   Sun,  5 Apr 2020 22:42:46 +0700
From:   Sergey Shatunov <me@...k.pw>
To:     nivedita@...m.mit.edu
Cc:     bp@...en8.de, hpa@...or.com, linux-kernel@...r.kernel.org,
        mingo@...hat.com, tglx@...utronix.de, x86@...nel.org
Subject: Re: [PATCH 1/2] x86/boot/compressed/64: Remove .bss/.pgtable from bzImage

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.
So bisect points to that commit and I tried to compile kernel with that commit reverted and it works flawlessly.

Some notes about my setup:
Kernel tree I used: Torvalds git (which recently pulls that commit).
Kernel itself with initrd and cmdline packed into systemd-boot stub (probably here can be issues too, not sure).
Secure boot enabled with custom keyring.

I can provide more info or change my setup (for example get rid of systemd-boot stub) if needed for sure.